simplify NamedType interface (#23691)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23691
We had a lot of redundant methods. Killing them.
Test Plan: Imported from OSS
Differential Revision: D16611883
Pulled By: suo
fbshipit-source-id: a32c0a8b8b7e909b386a70abb0827c26cbd37e20
