Deprecate torch.pstrf (#17866)
Summary:
Changelog:
- Add deprecation warning to torch.pstrf
Pull Request resolved: https://github.com/pytorch/pytorch/pull/17866
Differential Revision: D14405527
Pulled By: soumith
fbshipit-source-id: 73f3b7d61c60eb57e4bffd08112e552ae3e6dfdc
