Back out "[Quant] Added 4 bit support for embedding quantized module" (#70273)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70273
Original commit changeset: 73e63383cf60
Original Phabricator Diff: D33152674 (https://github.com/pytorch/pytorch/commit/9f512e129b48a84ca742f64d1a4c742361b3300c)
Test Plan: CI
Reviewed By: larryliu0820
Differential Revision: D33268459
fbshipit-source-id: 051bfcbbad3fa083301a3cea508d00946d6db881
