Remove preprocessing of CFLAGS, CPPFLAGS, and LDFLAGS in Python scripts. (#23528)
Summary:
After https://github.com/pytorch/pytorch/issues/23455, there is no need of this preprocessing in Python scripts.
They will be automatically processed in CMake (plus CPPFLAGS here
probably meant to be CXXFLAGS).
Reference:
- https://cmake.org/cmake/help/v3.15/envvar/CFLAGS.html
- https://cmake.org/cmake/help/v3.15/envvar/CXXFLAGS.html
- https://cmake.org/cmake/help/v3.15/envvar/LDFLAGS.html
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23528
Differential Revision: D16561561
Pulled By: ezyang
fbshipit-source-id: 962a27a2b0a18db0f95477ad067a2611e4128187
