Back out "[pytorch][PR] Add ability for a mobile::Module to save as flatbuffer" (#69796)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69796
(Note: this ignores all push blocking failures!)
Test Plan: External CI + Sandcastle
Reviewed By: zhxchen17
Differential Revision: D33032671
fbshipit-source-id: dbf6690e960e25d6a5f19043cbe792add2acd7ef
