How do you delete an outstanding TFS team project root directory?
The team project, MyProblemProject, has been deleted from TFS, but my local file system still has the root directory. 
If I delete my local directory, C:\Dev\MyProblemProject, Visual Studio flags the delete as a pending excluded change. But if I try and promote the delete change, I get the error ...
TF101069: Unsupported pend change attempted on team project $/MyProblemProject. Use the Project Creation Wizard in Team Explorer to create a project or the Team Project deletion tool to delete one
Tried using tfsdeleteproject but it gives a TF200016 The project does not exist
So how can I delete the local directory and not have Visual Studio see it as a delete change?
... and why does VS still think the directory is in TFS, as I can't see the MyProblemProject?