Deprecate untyped Dicts (#22516)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22516
Force anybody creating an untyped Dict to call c10::impl::deprecatedUntypedDict().
This should hopefully make it clear that this is not public API and prevent people from using it.
Differential Revision: D16115215
fbshipit-source-id: 2ef4cb443da1cdf4ebf5b99851f69de0be730b97
