Fix B902 lint error: invalid first argument. (#18181)

Fix B902 lint error: invalid first argument. (#18181)

Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18181
ghimport-source-id: 9c23551584a1a1b0b7ac246367f3a7ae1c50b315

Stack from [ghstack](https://github.com/ezyang/ghstack):
* #18184 Fix B903 lint: save memory for data classes with slots/namedtuple
* **#18181 Fix B902 lint error: invalid first argument.**
* #18178 Fix B006 lint errors: using mutable structure in default argument.
* #18177 Fix lstrip bug revealed by B005 lint

A variety of sins were committed:
- Some code was dead
- Some code was actually a staticmethod
- Some code just named it the wrong way
- Some code was purposely testing the omitted case

Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Differential Revision: D14530876

fbshipit-source-id: 292a371d9a76ddc7bfcfd38b6f0da9165290a58e