Remove unused pass
Remove unused pass

Summary:
This pass was substituted by SwitchCleanup. The patterns/classes it looks for
don't exist anymore.

Reviewed By: maxmg22

Differential Revision: D6106932

fbshipit-source-id: fd3a9a4cd473b2448da9d6d42736ef4ec9186025

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex