chore(windows): remove cleanup-alpha-tasks

Remove the CleanupAlphaTasks that was specific to task
schedules created it for 15.0 alpha. Scheduled tasks naming
was changed to include a user name in the task. The clean up
function was to make sure the previous named tasks were removed.
Now there should be no 15.0 alpha users it can be removed.

windows/src/desktop/kmshell/util/Keyman.System.KeymanStartTask.pas

@@ -11,7 +11,6 @@ interface
   TKeymanStartTask = class
   private
     class function GetTaskName: string;
-    class procedure CleanupAlphaTasks(pTaskFolder: ITaskFolder); static;
   {$IF FALSE}
     //Disabled to avoid hint during build; re-enable if wanting to
     //re-establish the task model
@@ -115,15 +114,6 @@ class procedure TKeymanStartTask.CreateTask;
     end;
   end;
 
-  try
-    CleanupAlphaTasks(pTaskFolder);
-  except
-    on E:Exception do
-    begin
-      TKeymanSentryClient.ReportHandledException(E, 'Failed to cleanup alpha tasks');
-    end;
-  end;
-
   try
     // Create a new task
     pTask := pService.NewTask(0);
@@ -228,8 +218,6 @@ class procedure TKeymanStartTask.DeleteTask;
       end;
     end;
 
-    CleanupAlphaTasks(pTaskFolder);
-
     if pTaskFolder.GetTasks(0).Count = 0 then
     begin
       pTaskFolder := nil;
@@ -260,36 +248,4 @@ class procedure TKeymanStartTask.RecreateTask;
   CreateTask;
 end;
 
-class procedure TKeymanStartTask.CleanupAlphaTasks(pTaskFolder: ITaskFolder);
-var
-  tasks: IRegisteredTaskCollection;
-  i: Integer;
-begin
-  // Cleanup earlier alpha-version tasks: we renamed the task to include the
-  // user's login name in build 14.0.194 of Keyman, so that multiple users could
-  // create the task on the same machine. It's not obvious, but the Tasks
-  // namespace is shared between all users -- non-admin users will not be able
-  // to see or overwrite tasks created by other users; they'd just get a
-  // (silent) access denied result.
-  try
-    tasks := pTaskFolder.GetTasks(0);
-    for i := 1 to tasks.Count do
-      if SameText(tasks.Item[i].Name, CTaskName) then
-      begin
-        tasks := nil;
-        pTaskFolder.DeleteTask(CTaskName, 0);
-        Exit;
-      end;
-  except
-    on E:EOleException do
-    begin
-      if (E.ErrorCode <> HResultFromWin32(ERROR_FILE_NOT_FOUND)) and
-        (E.ErrorCode <> HResultFromWin32(ERROR_ACCESS_DENIED)) then
-        // We ignore when the task doesn't exist, but report other errors
-        TKeymanSentryClient.ReportHandledException(E, 'Failed to delete task '+CTaskName);
-    end;
-  end;
-end;
-
-
 end.