[pytorch] remove unused flags from code analyzer & move format support to python (#37393)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37393
Simplify the code analyzer by removing some unused flags and moving the
different format printer logic to python script. It's easier to add other
post processing logic to adapt to different BUCK build configs.
Test Plan: Imported from OSS
Differential Revision: D21280836
Pulled By: ljk53
fbshipit-source-id: 0d66d5891d850f012c4ab4f39eabbd9aecc1caa9
