Remove obsolete monaco workaround (#30893)
This workaround is not neccessary any more since monaco 0.35.0.
Ref: https://github.com/microsoft/monaco-editor/issues/2962
Ref: https://github.com/microsoft/vscode/pull/173688
(cherry picked from commit d9b37d085acb7e93409061e541b6a3aa53261bb0)
authored by