Move qconfig removal into convert() (#41930)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/41930
As title
ghstack-source-id: 108517079
Test Plan: CI
Reviewed By: jerryzh168
Differential Revision: D22698386
fbshipit-source-id: 4f748c9bae4a0b615aa69c7cc8d8e451e5d26863
