Delete .clang-tidy-oss (#62373)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62373
Internal clang-tidy can handle all the options after D29863426 was deployed
Test Plan: CI
Reviewed By: 1ntEgr8
Differential Revision: D29978471
fbshipit-source-id: ea531734ab4fc3e0a26552bd24846b22c2e5c745
