[Opt Overlap] Remove redundant tests (#71600)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71600
These tests in test_c10d_nccl test a subset of functionality that's
already covered by distributed_test.py, no need for these additional tests.
ghstack-source-id: 147458823
Test Plan: CI
Reviewed By: cbalioglu
Differential Revision: D33662679
fbshipit-source-id: 2d1c1223fdd72a851c537b4793a71d65190d2553
(cherry picked from commit 14565ac5a6e059ec06af8583fcefa80626c95990)
