return missing keys from load_state_dict (#18668)
Summary:
return missing_keys and unexpected_keys from load_state_dict so the user can handle them when strict mode is off; also removed an unused variable
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18668
Differential Revision: D14782073
Pulled By: ezyang
fbshipit-source-id: ab3b855eb77bb7422594d971988067e86eef20f2
