Remove workarounds for bugs that have been fixed (#78779)

Closes #77995

Author: jasonmalinowski

src/EditorFeatures/TestUtilities/TestExtensionErrorHandler.cs

@@ -27,27 +27,6 @@ public TestExtensionErrorHandler()
 
     public void HandleError(object sender, Exception exception)
     {
-        // Work around bug that is fixed in https://devdiv.visualstudio.com/DevDiv/_git/VS-Platform/pullrequest/209513
-        if (exception is NullReferenceException &&
-            exception.StackTrace.Contains("SpanTrackingWpfToolTipPresenter"))
-        {
-            return;
-        }
-
-        // Work around for https://github.com/dotnet/roslyn/issues/42982
-        if (exception is NullReferenceException &&
-            exception.StackTrace.Contains("Microsoft.CodeAnalysis.Completion.Providers.AbstractEmbeddedLanguageCompletionProvider.GetLanguageProviders"))
-        {
-            return;
-        }
-
-        // Work around for https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1091056
-        if (exception is InvalidOperationException &&
-            exception.StackTrace.Contains("Microsoft.VisualStudio.Language.Intellisense.AsyncCompletion.Implementation.CompletionTelemetryHost"))
-        {
-            return;
-        }
-
         // This exception is unexpected and as such we want the containing test case to
         // fail. Unfortuntately throwing an exception here is not going to help because
         // the editor is going to catch and swallow it. Store it here and wait for the 

src/VisualStudio/IntegrationTest/TestSetup/TestExtensionErrorHandler.cs

@@ -22,12 +22,6 @@ public TestExtensionErrorHandler()
 
     public void HandleError(object sender, Exception exception)
     {
-        if (exception.Message == "RemotePartyTerminated" && new System.Diagnostics.StackTrace().ToString().Contains("CodeLens") ||
-            exception.Message == "Cannot access a disposed object.\r\nObject name: 'CodeLensHubClient'.")
-        {
-            return;
-        }
-
         FatalError.ReportAndPropagate(exception);
         TestTraceListener.Instance.AddException(exception);
     }