Remove unused usings in Microsoft.CodeAnalysis.Features

src/Compilers/Core/Portable/Text/TextUtilities.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
-using System.IO;
-using System.Text;
-
 namespace Microsoft.CodeAnalysis.Text
 {
     /// <summary>

src/Features/Core/Portable/AddAccessibilityModifiers/AbstractAddAccessibilityModifiersDiagnosticAnalyzer.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
-using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.CodeStyle;
 using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.Editing;

src/Features/Core/Portable/AddConstructorParametersFromMembers/AddConstructorParametersFromMembersCodeRefactoringProvider.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Composition;
 using System.Linq;

src/Features/Core/Portable/AddImport/AddImportFixData.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
-using System.Linq;
 using Microsoft.CodeAnalysis.CodeActions;
 using Microsoft.CodeAnalysis.Tags;
 using Microsoft.CodeAnalysis.Text;

src/Features/Core/Portable/AddImport/Remote/AbstractAddImportFeatureService_Remote.cs

@@ -2,7 +2,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.SymbolSearch;

src/Features/Core/Portable/AddImport/Remote/IRemoteAddImportFeatureService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System.Collections.Generic;
-using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.Packaging;

src/Features/Core/Portable/AddParameter/AbstractAddParameterCodeFixProvider.cs

@@ -8,14 +8,10 @@
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;
 using Microsoft.CodeAnalysis.CodeFixes;
-using Microsoft.CodeAnalysis.CodeGeneration;
-using Microsoft.CodeAnalysis.Editing;
-using Microsoft.CodeAnalysis.FindSymbols;
 using Microsoft.CodeAnalysis.Formatting;
 using Microsoft.CodeAnalysis.LanguageServices;
 using Microsoft.CodeAnalysis.PooledObjects;
 using Microsoft.CodeAnalysis.Shared.Extensions;
-using Microsoft.CodeAnalysis.Shared.Utilities;
 using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.AddParameter

src/Features/Core/Portable/AddParameter/ArgumentInsertPositionData.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
-using System.Collections.Generic;
-using System.Text;
-
 namespace Microsoft.CodeAnalysis.AddParameter
 {
     internal readonly struct ArgumentInsertPositionData<TArgumentSyntax> where TArgumentSyntax : SyntaxNode

src/Features/Core/Portable/AddParameter/CodeFixData.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System;
-using System.Collections.Generic;
-using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 

src/Features/Core/Portable/AddParameter/RegisterFixData.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
-using System.Collections.Generic;
 using System.Collections.Immutable;
-using System.Text;
 
 namespace Microsoft.CodeAnalysis.AddParameter
 {

src/Features/Core/Portable/AddRequiredParentheses/AbstractAddRequiredParenthesesDiagnosticAnalyzer.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.CodeStyle;

src/Features/Core/Portable/ChangeSignature/DelegateInvokeMethodReferenceFinder.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;
 using System.Threading;

src/Features/Core/Portable/CodeFixes/Async/AbstractAddAwaitCodeFixProvider.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System;
-using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;

src/Features/Core/Portable/CodeFixes/CodeFixCollection.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System.Collections.Immutable;
-using Microsoft.CodeAnalysis.CodeFixes.Suppression;
 using Microsoft.CodeAnalysis.Text;
 
 namespace Microsoft.CodeAnalysis.CodeFixes

src/Features/Core/Portable/CodeFixes/Configuration/ConfigureCodeStyle/ConfigureCodeStyleOptionCodeFixProvider.cs

@@ -3,7 +3,6 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
-using System.Composition;
 using System.Diagnostics;
 using System.Linq;
 using System.Threading;
@@ -13,7 +12,6 @@
 using Microsoft.CodeAnalysis.CodeStyle;
 using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.Options;
-using Microsoft.CodeAnalysis.Options.EditorConfig;
 using Microsoft.CodeAnalysis.PooledObjects;
 using Microsoft.CodeAnalysis.Text;
 using static Microsoft.CodeAnalysis.CodeActions.CodeAction;

src/Features/Core/Portable/CodeFixes/Configuration/ConfigureSeverity/ConfigureSeverityLevelCodeFixProvider.cs

@@ -2,12 +2,10 @@
 
 using System.Collections.Generic;
 using System.Collections.Immutable;
-using System.Composition;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;
 using Microsoft.CodeAnalysis.CodeFixes.Suppression;
-using Microsoft.CodeAnalysis.Options.EditorConfig;
 using Microsoft.CodeAnalysis.PooledObjects;
 using Microsoft.CodeAnalysis.Text;
 using static Microsoft.CodeAnalysis.CodeActions.CodeAction;

src/Features/Core/Portable/CodeFixes/FixAllOccurrences/IFixAllGetFixesService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;

src/Features/Core/Portable/CodeFixes/Suppression/AbstractSuppressionCodeFixProvider.PragmaBatchFixHelpers.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;

src/Features/Core/Portable/CodeFixes/Suppression/AbstractSuppressionCodeFixProvider.PragmaWarningBatchFixAllProvider.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Concurrent;
 using System.Collections.Immutable;
 using System.Linq;

src/Features/Core/Portable/CodeFixes/Suppression/AbstractSuppressionCodeFixProvider.RemoveSuppressionCodeAction.BatchFixer.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Collections.Immutable;

src/Features/Core/Portable/CodeRefactorings/ICodeRefactoringService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;

src/Features/Core/Portable/CodeRefactorings/MoveType/AbstractMoveTypeService.Editor.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;

src/Features/Core/Portable/CodeRefactorings/MoveType/AbstractMoveTypeService.MoveTypeCodeAction.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;

src/Features/Core/Portable/CodeRefactorings/MoveType/AbstractMoveTypeService.MoveTypeEditor.cs

@@ -8,7 +8,6 @@
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis;
-using Microsoft.CodeAnalysis.CodeActions;
 using Microsoft.CodeAnalysis.Editing;
 using Microsoft.CodeAnalysis.Formatting;
 using Microsoft.CodeAnalysis.LanguageServices;

src/Features/Core/Portable/CodeRefactorings/MoveType/AbstractMoveTypeService.MoveTypeNamespaceScopeEditor.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;

src/Features/Core/Portable/CodeRefactorings/MoveType/AbstractMoveTypeService.RenameFileEditor.cs

@@ -4,7 +4,6 @@
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;
-using Microsoft.CodeAnalysis.Rename;
 
 namespace Microsoft.CodeAnalysis.CodeRefactorings.MoveType
 {

src/Features/Core/Portable/CodeRefactorings/MoveType/AbstractMoveTypeService.RenameTypeEditor.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
-using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.CodeAnalysis.CodeActions;
 using Microsoft.CodeAnalysis.Rename;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.CodeRefactorings.MoveType
 {

src/Features/Core/Portable/CommentSelection/AbstractCommentSelectionService.cs

@@ -7,7 +7,6 @@
 using Microsoft.CodeAnalysis.Formatting;
 using Microsoft.CodeAnalysis.Shared.Utilities;
 using Microsoft.CodeAnalysis.Text;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.CommentSelection
 {

src/Features/Core/Portable/Common/TaggedText.cs

@@ -5,7 +5,6 @@
 using System.Collections.Immutable;
 using System.Linq;
 using Microsoft.CodeAnalysis.Classification;
-using Microsoft.CodeAnalysis.Collections;
 using Microsoft.CodeAnalysis.PooledObjects;
 using Microsoft.CodeAnalysis.Text;
 using Roslyn.Utilities;

src/Features/Core/Portable/Completion/CompletionHelperServiceFactory.cs

-using System;
-using System.Collections.Generic;
-using System.Collections.Immutable;
-using System.Composition;
-using System.Globalization;
-using System.Text;
+using System.Composition;
 using Microsoft.CodeAnalysis.Host;
 using Microsoft.CodeAnalysis.Host.Mef;
 using Microsoft.CodeAnalysis.LanguageServices;
 using Microsoft.CodeAnalysis.Shared.Extensions;
-using Microsoft.CodeAnalysis.Text;
 
 namespace Microsoft.CodeAnalysis.Completion
 {

src/Features/Core/Portable/Completion/ICompletionHelperService.cs

-using System.Collections.Immutable;
-using System.Globalization;
-using Microsoft.CodeAnalysis.Host;
-using Microsoft.CodeAnalysis.Text;
+using Microsoft.CodeAnalysis.Host;
 
 namespace Microsoft.CodeAnalysis.Completion
 {

src/Features/Core/Portable/Completion/Providers/AbstractMemberInsertingCompletionProvider.cs

@@ -11,7 +11,6 @@
 using Microsoft.CodeAnalysis.Text;
 using Roslyn.Utilities;
 using System.Collections.Immutable;
-using System.Collections.Generic;
 
 namespace Microsoft.CodeAnalysis.Completion.Providers
 {

src/Features/Core/Portable/Completion/Providers/AbstractObjectCreationCompletionProvider.cs

@@ -12,7 +12,6 @@
 using Microsoft.CodeAnalysis.Shared.Extensions.ContextQuery;
 using Roslyn.Utilities;
 using Microsoft.CodeAnalysis.Shared.Utilities;
-using System;
 
 namespace Microsoft.CodeAnalysis.Completion.Providers
 {

src/Features/Core/Portable/Completion/Providers/AbstractOverrideCompletionProvider.ItemGetter.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;

src/Features/Core/Portable/Completion/Providers/AbstractOverrideCompletionProvider.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.CodeAnalysis.CodeGeneration;
 using Microsoft.CodeAnalysis.Editing;
 using Microsoft.CodeAnalysis.Shared.Extensions;
 using Microsoft.CodeAnalysis.Text;

src/Features/Core/Portable/Completion/Providers/AbstractRecommendationServiceBasedCompletionProvider.cs

@@ -6,7 +6,6 @@
 using Microsoft.CodeAnalysis.Shared.Extensions;
 using Microsoft.CodeAnalysis.Shared.Extensions.ContextQuery;
 using Microsoft.CodeAnalysis.Shared.Utilities;
-using Microsoft.CodeAnalysis.Text;
 using Roslyn.Utilities;
 using System.Collections.Generic;
 using System.Collections.Immutable;

src/Features/Core/Portable/Completion/Providers/SymbolCompletionItem.cs

@@ -8,7 +8,6 @@
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.Shared.Extensions;
 using Microsoft.CodeAnalysis.Shared.Utilities;
-using Microsoft.CodeAnalysis.Text;
 
 namespace Microsoft.CodeAnalysis.Completion.Providers
 {

src/Features/Core/Portable/ConflictMarkerResolution/AbstractConflictMarkerCodeFixProvider.cs

@@ -2,7 +2,6 @@
 
 using System;
 using System.Collections.Immutable;
-using System.Composition;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;

src/Features/Core/Portable/ConvertAnonymousTypeToTuple/AbstractConvertAnonymousTypeToTupleCodeFixProvider.cs

@@ -13,7 +13,6 @@
 using Microsoft.CodeAnalysis.Formatting;
 using Microsoft.CodeAnalysis.LanguageServices;
 using Microsoft.CodeAnalysis.Shared.Extensions;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.ConvertAnonymousTypeToTuple
 {

src/Features/Core/Portable/ConvertAnonymousTypeToTuple/AbstractConvertAnonymousTypeToTupleDiagnosticAnalyzer.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using Microsoft.CodeAnalysis.CodeStyle;
 using Microsoft.CodeAnalysis.Diagnostics;
 

src/Features/Core/Portable/ConvertForToForEach/AbstractConvertForToForEachCodeRefactoringProvider.cs

@@ -13,7 +13,6 @@
 using Microsoft.CodeAnalysis.Operations;
 using Microsoft.CodeAnalysis.Options;
 using Microsoft.CodeAnalysis.Shared.Extensions;
-using Microsoft.CodeAnalysis.Text;
 using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.ConvertForToForEach

src/Features/Core/Portable/ConvertToInterpolatedString/AbstractConvertPlaceholderToInterpolatedStringRefactoringProvider.cs

@@ -14,7 +14,6 @@
 using Microsoft.CodeAnalysis.Simplification;
 using Microsoft.CodeAnalysis.Formatting;
 using Microsoft.CodeAnalysis.CodeRefactorings;
-using System.Collections.Generic;
 
 namespace Microsoft.CodeAnalysis.ConvertToInterpolatedString
 {

src/Features/Core/Portable/Debugging/DebuggingWorkspaceService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System;
-using System.Composition;
 using Microsoft.CodeAnalysis.EditAndContinue;
 
 namespace Microsoft.CodeAnalysis.Debugging

src/Features/Core/Portable/DesignerAttributes/IRemoteDesignerAttributeService.cs

@@ -2,7 +2,6 @@
 
 using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.CodeAnalysis.Execution;
 
 namespace Microsoft.CodeAnalysis.DesignerAttributes
 {

src/Features/Core/Portable/Diagnostics/Analyzers/IDEDiagnosticIds.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
-using System.Collections.Generic;
-using System.Reflection;
-
 namespace Microsoft.CodeAnalysis.Diagnostics
 {
     internal static class IDEDiagnosticIds

src/Features/Core/Portable/Diagnostics/Analyzers/RemoveUnnecessaryCastDiagnosticAnalyzerBase.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System.Collections.Immutable;
-using System.Linq;
 using System.Threading;
 using Microsoft.CodeAnalysis.CodeStyle;
 using Microsoft.CodeAnalysis.Shared.Extensions;

src/Features/Core/Portable/Diagnostics/Analyzers/UnboundIdentifiersDiagnosticAnalyzerBase.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Immutable;
 using System.Linq;
 using Roslyn.Utilities;

src/Features/Core/Portable/Diagnostics/DiagnosticAnalyzerService_BuildSynchronization.cs

@@ -2,7 +2,6 @@
 
 using System.Collections.Immutable;
 using System.Threading.Tasks;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.Diagnostics
 {

src/Features/Core/Portable/Diagnostics/DiagnosticEventTaskScheduler.cs

@@ -4,7 +4,6 @@
 using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.Diagnostics
 {

src/Features/Core/Portable/Diagnostics/DiagnosticsUpdatedArgs.cs

@@ -2,7 +2,6 @@
 
 using System.Collections.Immutable;
 using System.Diagnostics;
-using System.Linq;
 using Microsoft.CodeAnalysis.Common;
 
 namespace Microsoft.CodeAnalysis.Diagnostics

src/Features/Core/Portable/Diagnostics/EngineV2/DiagnosticIncrementalAnalyzer.InMemoryStorage.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Concurrent;
 using System.Collections.Immutable;
 using Roslyn.Utilities;

src/Features/Core/Portable/Diagnostics/EngineV2/DiagnosticIncrementalAnalyzer.cs

@@ -9,8 +9,6 @@
 using Microsoft.CodeAnalysis.CodeStyle;
 using Microsoft.CodeAnalysis.Diagnostics.Log;
 using Microsoft.CodeAnalysis.Options;
-using Microsoft.CodeAnalysis.PooledObjects;
-using Microsoft.CodeAnalysis.Shared.Extensions;
 using Microsoft.CodeAnalysis.Shared.Options;
 using Microsoft.CodeAnalysis.Simplification;
 using Microsoft.CodeAnalysis.SolutionCrawler;

src/Features/Core/Portable/Diagnostics/IDiagnosticService.cs

@@ -4,7 +4,6 @@
 using System.Collections.Generic;
 using System.Threading;
 using Microsoft.CodeAnalysis.Common;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.Diagnostics
 {

src/Features/Core/Portable/Diagnostics/Log/DiagnosticAnalyzerLogger.cs

@@ -7,7 +7,6 @@
 using System.Text;
 using Microsoft.CodeAnalysis.Diagnostics.Telemetry;
 using Microsoft.CodeAnalysis.Internal.Log;
-using Roslyn.Utilities;
 using System.Security.Cryptography;
 
 namespace Microsoft.CodeAnalysis.Diagnostics.Log

src/Features/Core/Portable/DisposeAnalysis/DisposableFieldsShouldBeDisposedDiagnosticAnalyzer.cs

@@ -8,7 +8,6 @@
 using Microsoft.CodeAnalysis.CodeQuality;
 using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.FlowAnalysis;
-using Microsoft.CodeAnalysis.FlowAnalysis.DataFlow;
 using Microsoft.CodeAnalysis.FlowAnalysis.DataFlow.DisposeAnalysis;
 using Microsoft.CodeAnalysis.FlowAnalysis.DataFlow.PointsToAnalysis;
 using Microsoft.CodeAnalysis.Operations;

src/Features/Core/Portable/DocumentHighlighting/IRemoteDocumentHighlights.cs

@@ -2,7 +2,6 @@
 
 using System.Collections.Generic;
 using System.Collections.Immutable;
-using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 

src/Features/Core/Portable/DocumentationComments/CodeFixes/AbstractRemoveDocCommentNodeCodeFixProvider.cs

@@ -3,7 +3,6 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
-using System.Diagnostics;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;

src/Features/Core/Portable/EditAndContinue/EditAndContinueService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System;
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Diagnostics;
-using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.Diagnostics;

src/Features/Core/Portable/EditAndContinue/EditSession.cs

@@ -4,7 +4,6 @@
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Diagnostics;
-using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Linq;
 using System.Reflection.Metadata;

src/Features/Core/Portable/EditAndContinue/EncEditSessionInfo.cs

@@ -2,7 +2,6 @@
 
 using System;
 using System.Collections.Generic;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.EditAndContinue
 {

src/Features/Core/Portable/EditAndContinue/IActiveStatementProvider.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;

src/Features/Core/Portable/EditAndContinue/IEditAndContinueService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;

src/Features/Core/Portable/EditAndContinue/LinePositionSpanExtensions.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
-using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.Text;
 
 namespace Microsoft.CodeAnalysis.EditAndContinue

src/Features/Core/Portable/EditAndContinue/TraceLog.cs

@@ -3,7 +3,6 @@
 using System;
 using System.Diagnostics;
 using System.Threading;
-using Roslyn.Utilities;
 using System.Linq;
 
 namespace Microsoft.CodeAnalysis.EditAndContinue

src/Features/Core/Portable/EmbeddedLanguages/RegularExpressions/RegexDocumentHighlightsService.cs

@@ -10,7 +10,6 @@
 using Microsoft.CodeAnalysis.EmbeddedLanguages.RegularExpressions.LanguageServices;
 using Microsoft.CodeAnalysis.EmbeddedLanguages.VirtualChars;
 using Microsoft.CodeAnalysis.Text;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.Features.EmbeddedLanguages.RegularExpressions
 {

src/Features/Core/Portable/Emit/CompilationOutputFiles.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.IO;
 using Roslyn.Utilities;
 

src/Features/Core/Portable/ExtractInterface/ExtractInterfaceOptionsResult.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 
 namespace Microsoft.CodeAnalysis.ExtractInterface

src/Features/Core/Portable/ExtractMethod/ExtractMethodMatrix.cs

@@ -3,8 +3,6 @@
 using System;
 using System.Collections.Generic;
 using Microsoft.CodeAnalysis.ErrorReporting;
-using Microsoft.CodeAnalysis.Internal.Log;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.ExtractMethod
 {

src/Features/Core/Portable/ExtractMethod/MethodExtractor.CodeGenerator.cs

@@ -8,7 +8,6 @@
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CodeGeneration;
-using Microsoft.CodeAnalysis.Options;
 using Microsoft.CodeAnalysis.PooledObjects;
 using Microsoft.CodeAnalysis.Shared.Extensions;
 using Microsoft.CodeAnalysis.Simplification;

src/Features/Core/Portable/FindUsages/DefinitionItem.DocumentLocationDefinitionItem.cs

@@ -2,9 +2,7 @@
 
 using System;
 using System.Collections.Immutable;
-using System.Linq;
 using System.Threading;
-using Microsoft.CodeAnalysis.FindSymbols;
 using Microsoft.CodeAnalysis.Navigation;
 using Roslyn.Utilities;
 

src/Features/Core/Portable/FindUsages/DefinitionItem.cs

@@ -2,7 +2,6 @@
 
 using System;
 using System.Collections.Immutable;
-using Microsoft.CodeAnalysis.Completion;
 using Microsoft.CodeAnalysis.Tags;
 using Roslyn.Utilities;
 

src/Features/Core/Portable/FullyQualify/AbstractFullyQualifyCodeFixProvider.SymbolResult.cs

@@ -4,7 +4,6 @@
 using System.Collections.Generic;
 using System.Diagnostics;
 using Microsoft.CodeAnalysis.Shared.Extensions;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.CodeFixes.FullyQualify
 {

src/Features/Core/Portable/GenerateConstructorFromMembers/GenerateConstructorFromMembersCodeRefactoringProvider.ConstructorDelegatingCodeAction.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;
 using System.Threading;
@@ -12,7 +11,6 @@
 using Microsoft.CodeAnalysis.LanguageServices;
 using Microsoft.CodeAnalysis.PooledObjects;
 using Microsoft.CodeAnalysis.Shared.Extensions;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.GenerateConstructorFromMembers
 {

src/Features/Core/Portable/GenerateConstructorFromMembers/GenerateConstructorFromMembersCodeRefactoringProvider.FieldDelegatingCodeAction.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
@@ -11,7 +10,6 @@
 using Microsoft.CodeAnalysis.Editing;
 using Microsoft.CodeAnalysis.LanguageServices;
 using Microsoft.CodeAnalysis.Shared.Extensions;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.GenerateConstructorFromMembers
 {

src/Features/Core/Portable/GenerateEqualsAndGetHashCodeFromMembers/FormatLargeBinaryExpressionRule.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System.Collections.Generic;
-using Microsoft.CodeAnalysis.CodeActions;
 using Microsoft.CodeAnalysis.Formatting.Rules;
 using Microsoft.CodeAnalysis.LanguageServices;
 using Microsoft.CodeAnalysis.Options;

src/Features/Core/Portable/GenerateMember/GenerateDefaultConstructors/AbstractGenerateDefaultConstructorsService.AbstractCodeAction.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System.Collections.Generic;
-using System.Collections.Immutable;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;

src/Features/Core/Portable/GenerateMember/GenerateEnumMember/AbstractGenerateEnumMemberService.CodeAction.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;
 using Microsoft.CodeAnalysis.CodeGeneration;
-using Microsoft.CodeAnalysis.Editing;
 using Microsoft.CodeAnalysis.LanguageServices;
 using Microsoft.CodeAnalysis.Shared.Utilities;
 

src/Features/Core/Portable/GenerateMember/GenerateEnumMember/AbstractGenerateEnumMemberService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;
 using Microsoft.CodeAnalysis.Internal.Log;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.GenerateMember.GenerateEnumMember
 {

src/Features/Core/Portable/GenerateMember/GenerateParameterizedMember/AbstractGenerateConversionService.cs

@@ -6,7 +6,6 @@
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;
 using Microsoft.CodeAnalysis.Internal.Log;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.GenerateMember.GenerateParameterizedMember
 {

src/Features/Core/Portable/GenerateMember/GenerateParameterizedMember/AbstractGenerateMethodService.State.cs

@@ -5,7 +5,6 @@
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeGeneration;
-using Microsoft.CodeAnalysis.Editing;
 using Microsoft.CodeAnalysis.LanguageServices;
 using Microsoft.CodeAnalysis.Shared.Extensions;
 using Roslyn.Utilities;

src/Features/Core/Portable/GenerateMember/GenerateParameterizedMember/AbstractGenerateMethodService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;
 using Microsoft.CodeAnalysis.Internal.Log;
 using Microsoft.CodeAnalysis.LanguageServices;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.GenerateMember.GenerateParameterizedMember
 {

src/Features/Core/Portable/GenerateMember/GenerateParameterizedMember/AbstractGenerateParameterizedMemberService.MethodSignatureInfo.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Threading;
 using Microsoft.CodeAnalysis.Utilities;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.GenerateMember.GenerateParameterizedMember
 {

src/Features/Core/Portable/GenerateMember/GenerateParameterizedMember/AbstractGenerateParameterizedMemberService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Threading;
 using Microsoft.CodeAnalysis.CodeActions;

src/Features/Core/Portable/GenerateMember/GenerateVariable/AbstractGenerateVariableService.CodeAction.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;
 using System.Threading;

src/Features/Core/Portable/GenerateOverrides/GenerateOverridesWithDialogCodeAction.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Threading;

src/Features/Core/Portable/ImplementAbstractClass/AbstractImplementAbstractClassService.State.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Threading;
 using Microsoft.CodeAnalysis.CodeGeneration;

src/Features/Core/Portable/ImplementAbstractClass/AbstractImplementAbstractClassService.cs

@@ -3,7 +3,6 @@
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.Internal.Log;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.ImplementAbstractClass
 {

src/Features/Core/Portable/ImplementInterface/AbstractImplementInterfaceService.CodeAction_Property.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;
 using System.Threading;

src/Features/Core/Portable/ImplementInterface/AbstractImplementInterfaceService.DisposePatternCodeAction.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;
 using System.Threading;

src/Features/Core/Portable/ImplementInterface/AbstractImplementInterfaceService.State.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Threading;

src/Features/Core/Portable/ImplementInterface/AbstractImplementInterfaceService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;

src/Features/Core/Portable/IncrementalCaches/SyntaxTreeInfoIncrementalAnalyzerProvider.cs

@@ -6,7 +6,6 @@
 using Microsoft.CodeAnalysis.FindSymbols;
 using Microsoft.CodeAnalysis.Remote;
 using Microsoft.CodeAnalysis.SolutionCrawler;
-using Roslyn.Utilities;
 
 namespace Microsoft.CodeAnalysis.IncrementalCaches
 {

src/Features/Core/Portable/IntroduceVariable/AbstractIntroduceVariableService.AbstractIntroduceVariableCodeAction.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;

src/Features/Core/Portable/IntroduceVariable/IIntroduceVariableService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;

src/Features/Core/Portable/MoveDeclarationNearReference/AbstractMoveDeclarationNearReferenceService.cs

@@ -2,7 +2,6 @@
 
 using System;
 using System.Collections.Immutable;
-using System.Diagnostics;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.CodeActions;

src/Features/Core/Portable/MoveToNamespace/AbstractMoveToNamespaceService.cs

@@ -12,7 +12,6 @@
 using Microsoft.CodeAnalysis.Shared.Extensions;
 using Microsoft.CodeAnalysis.Text;
 using Microsoft.CodeAnalysis.LanguageServices;
-using System.Text;
 using System.Diagnostics;
 
 namespace Microsoft.CodeAnalysis.MoveToNamespace

src/Features/Core/Portable/MoveToNamespace/MoveToNamespaceOptionsResult.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Immutable;
-
 namespace Microsoft.CodeAnalysis.MoveToNamespace
 {
     internal class MoveToNamespaceOptionsResult

src/Features/Core/Portable/MoveToNamespace/MoveToNamespaceResult.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 
 namespace Microsoft.CodeAnalysis.MoveToNamespace

src/Features/Core/Portable/NavigateTo/AbstractNavigateToSearchService.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Threading;
 using System.Threading.Tasks;

src/Features/Core/Portable/Navigation/NavigableItemFactory.DeclaredSymbolNavigableItem.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
-using System;
 using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.FindSymbols;
-using Microsoft.CodeAnalysis.Tags;
 using Microsoft.CodeAnalysis.Text;
 
 namespace Microsoft.CodeAnalysis.Navigation