[rpc][easy] remove redundant test in rpc_test.py (#32588)
Summary:
Both `test_wait_all_workers` and `test_wait_all_workers_and_shutdown` test the same pattern of initialize RPC, call `_wait_all_workers`, and `rpc.shutdown(graceful=False)`.
`test_wait_all_workers` seems to be more thorough since it tests one worker driving and the others waiting on it as well.
We shouldn't have duplicate test so removing this `test_wait_all_workers_and_shutdown`.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/32588
Differential Revision: D19566294
Pulled By: rohan-varma
fbshipit-source-id: b69519d169b3964649d47ad75532bda5de538241
