pytorch

510334f3 - [BE] clean up IS_PYTORCH_CI and IN_CI (#60279)

[BE] clean up IS_PYTORCH_CI and IN_CI (#60279) Summary: `IS_PYTORCH_CI` and `IN_CI` are used randomly, however in some cases IN_CI is not currently set because it only exist in .circleci/scripts/setup_ci_environment.sh. This cleans up the 2 flags and only use IN_CI Pull Request resolved: https://github.com/pytorch/pytorch/pull/60279 Test Plan: CI Reviewed By: seemethere Differential Revision: D29239545 Pulled By: walterddr fbshipit-source-id: a069424a2bb8790a3adfdaf0dc460301026bf8c7