Better fix for arrow, backspace, and enter keys (#3419)

* Fix for #3267  --- Arrow keys and backspace stopped working

* fix keys

* Fix merge error

vsintegration/src/FSharp.Editor/LanguageService/LanguageService.fs

@@ -313,8 +313,6 @@ and
 
     let optionsAssociation = ConditionalWeakTable<IWorkspaceProjectContext, string[]>()
 
-    let lockObj = new Object()
-
     override this.Initialize() =
         base.Initialize()
 
@@ -459,11 +457,6 @@ and
                     let referencedProjectId = setup referencedSite                    
                     project.AddProjectReference(ProjectReference referencedProjectId)
 
-                lock lockObj (fun () -> 
-                    if not (workspace.ProjectTracker.ContainsProject(project)) then 
-                        workspace.ProjectTracker.AddProject(project) |> ignore
-                )
-
             projectId
         setup (siteProvider.GetProjectSite()) |> ignore