Back out "[caffe2] fix LLVM-12 nullptr-with-nonzero-offset UBSAN error" (#66055)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/66055
Original commit changeset: c31f179f8a7d
Reviewed By: igorsugak
Differential Revision: D31353348
fbshipit-source-id: 73d928e5c938ba604a7f9ea17a6250b57306e88f
