Remove local variable, it's only needed for value types

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

@@ -149,9 +149,8 @@ public async Task ForceAnalyzeAsync(Solution solution, ProjectId? projectId = nu
                     var index = 0;
                     foreach (var project in solution.Projects)
                     {
-                        var localProject = project;
                         tasks[index++] = Task.Run(
-                            () => analyzer.ForceAnalyzeProjectAsync(localProject, cancellationToken));
+                            () => analyzer.ForceAnalyzeProjectAsync(project, cancellationToken));
                     }
 
                     await Task.WhenAll(tasks).ConfigureAwait(false);