Remove some shims that were being used by Live Unit Testing

src/VisualStudio/Core/Def/Implementation/ProjectSystem/AbstractProject.cs

@@ -22,7 +22,7 @@ namespace Microsoft.VisualStudio.LanguageServices.Implementation.ProjectSystem
 {
     using Workspace = Microsoft.CodeAnalysis.Workspace;
 
-    [Obsolete("This is a compatibility shim for TypeScript and Live Unit Testing; please do not use it.")]
+    [Obsolete("This is a compatibility shim for TypeScript; please do not use it.")]
     internal abstract partial class AbstractProject : ForegroundThreadAffinitizedObject, IVisualStudioHostProject
     {
         internal const string ProjectGuidPropertyName = "ProjectGuid";

src/VisualStudio/Core/Def/Implementation/ProjectSystem/VisualStudioProjectTracker.cs

@@ -5,12 +5,10 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
-using System.Diagnostics;
 using System.Linq;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.Editor.Shared.Utilities;
 using Microsoft.CodeAnalysis.Host;
-using Microsoft.VisualStudio.LanguageServices.Implementation.ProjectSystem.Extensions;
 
 namespace Microsoft.VisualStudio.LanguageServices.Implementation.ProjectSystem
 {

src/VisualStudio/Core/Def/Implementation/ProjectSystem/VisualStudioWorkspaceImpl.cs

@@ -291,19 +291,6 @@ internal VisualStudioProjectTracker ProjectTracker
             return null;
         }
 
-        [Obsolete("This is a compatibility shim for Live Unit Testing; please do not use it.")]
-        internal AbstractProject? GetHostProject(ProjectId projectId)
-        {
-            var project = CurrentSolution.GetProject(projectId);
-
-            if (project == null)
-            {
-                return null;
-            }
-
-            return new StubProject(ProjectTracker, project, GetHierarchy(projectId), project.OutputFilePath);
-        }
-
         // TODO: consider whether this should be going to the project system directly to get this path. This is only called on interactions from the
         // Solution Explorer in the SolutionExplorerShim, where if we just could more directly get to the rule set file it'd simplify this.
         internal override string? TryGetRuleSetPathForProject(ProjectId projectId)
@@ -321,21 +308,6 @@ internal VisualStudioProjectTracker ProjectTracker
             }
         }
 
-        [Obsolete("This is a compatibility shim for Live Unit Testing; please do not use it.")]
-        private sealed class StubProject : AbstractProject
-        {
-            private readonly string? _outputPath;
-
-            public StubProject(VisualStudioProjectTracker projectTracker, CodeAnalysis.Project project, IVsHierarchy? hierarchy, string? outputPath)
-                : base(projectTracker, null, project.Name + "_Stub", null, hierarchy, project.Language, Guid.Empty, null, null, null, null)
-            {
-                _outputPath = outputPath;
-            }
-
-            protected override string? GetOutputFilePath()
-                => _outputPath;
-        }
-
         [Obsolete("This is a compatibility shim for TypeScript; please do not use it.")]
         internal IVisualStudioHostDocument? GetHostDocument(DocumentId documentId)
         {