pytorch

2ae74c06 - Compile less legacy code when BUILD_CAFFE2 is set to False (take 2) (#44453)

Compile less legacy code when BUILD_CAFFE2 is set to False (take 2) (#44453) Summary: 2nd attempt to land https://github.com/pytorch/pytorch/pull/44079 Pull Request resolved: https://github.com/pytorch/pytorch/pull/44453 Reviewed By: walterddr, seemethere Differential Revision: D23619528 Pulled By: malfet fbshipit-source-id: c7c206ebd327dcf3994789bd47008b05ff862fe7