code: def tearDown(self) -> None:
      del os.environ["GLOO_DEVICE_TRANSPORT"]
      del os.environ["NCCL_SOCKET_IFNAME"]
      super().tearDown()
  
imports: import itertools
  import multiprocessing
  import os
  import unittest
  from typing import Callable
  import torch
  import torch.distributed
  import torchrec.distributed.comm_ops
  from torchrec.distributed.utils import none_throws
  from torchrec.test_utils import get_free_port, seed_and_log
label_desc: Use image node_id 2 for calling the TestAllToAll obj's underlying member method code with example usage: obj.tearDown() without return types