[PyTorch] Remove CAFFE2_FB_LIMITED_MOBILE_CAPABILITY (#50385)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/50385
We no longer use this flag internally, and it's not referenced externally either, so let's clean up.
ghstack-source-id: 119676743
Test Plan: CI
Reviewed By: ezyang
Differential Revision: D25852220
fbshipit-source-id: a4427edff6cbb241340f9f6ae6db4e74832949c2
