Remove nonexistent files (#54276)
Summary:
Since both these files were deleted back in time, we shouldn't be running them anymore, as this was the old sharding strategy (see https://github.com/pytorch/pytorch/issues/50660).
```
test_python_nn.bat
test_python_all_except_nn.bat
```
I believe we intend to run all the python files, so I added a call for that instead.
Note: I don't believe there is a single unsharded test build, though, so should I instead just assume that all windows tests will be sharded?
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54276
Reviewed By: ejguan
Differential Revision: D27173045
Pulled By: janeyx99
fbshipit-source-id: a7562c1479e18bd63f192f02129a42911a73a70b
