simplify NamedType interface (#24278)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/24278
We had a lot of redundant methods. Killing them.
Test Plan: Imported from OSS
Differential Revision: D16800561
Pulled By: suo
fbshipit-source-id: 60acc1d5b0f34130a1f66a1e5bc7df364a5feb57
