Remove -Werror from test/cpp_extensions/setup.py (#32704)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/32704
-Werror is too aggressive check for test cpp extensions because it fails even on deprecation warnings which is are included from core codebase.
Fixes #32136
Test Plan: Imported from OSS
Differential Revision: D19620190
Pulled By: pbelevich
fbshipit-source-id: 0e91566eb5de853559bb59e68a02b0bb15e7341b
