Cleanup code.

src/EditorFeatures/CSharpTest/CodeActions/Preview/PreviewExceptionTests.cs

@@ -10,10 +10,9 @@
 using Microsoft.CodeAnalysis.Editor.UnitTests.Workspaces;
 using Microsoft.CodeAnalysis.Extensions;
 using Microsoft.CodeAnalysis.Text;
-using Roslyn.Utilities;
 using Roslyn.Test.Utilities;
+using Roslyn.Utilities;
 using Xunit;
-using Microsoft.CodeAnalysis.Editor.UnitTests.Utilities;
 
 namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.CodeRefactorings
 {
@@ -83,8 +82,8 @@ private async Task ActionSets(TestWorkspace workspace, CodeRefactoringProvider p
         }
 
         private static void RefactoringSetup(
-            TestWorkspace workspace, CodeRefactoringProvider provider, List<CodeAction> codeActions, 
-            out EditorLayerExtensionManager.ExtensionManager extensionManager, 
+            TestWorkspace workspace, CodeRefactoringProvider provider, List<CodeAction> codeActions,
+            out EditorLayerExtensionManager.ExtensionManager extensionManager,
             out VisualStudio.Text.ITextBuffer textBuffer)
         {
             var document = GetDocument(workspace);
@@ -96,4 +95,4 @@ private async Task ActionSets(TestWorkspace workspace, CodeRefactoringProvider p
             textBuffer = document.GetTextAsync().Result.Container.GetTextBuffer();
         }
     }
-}
+}
\ No newline at end of file