Handle properly attempts to sync of already removed drive. This happens when drive was just deleted but before this, in a moment, the client's script initiated auto-sync and it will try to sync in next few seconds and face with an error on the server. This error should be properly handled in REST services and ECMS filters:
DriveService.getState(DriveService.java:471)
CloudFileFilter.accept(CloudFileFilter.java:72) (reported in DEBUG log for the moment)