code: def tearDown(self):
      for config_file in self.config_files.values():
          os.unlink(config_file)
  
file_path: ClassyVision/test/trainer_distributed_trainer_test.py
imports: import copy
  import json
  import os
  import subprocess
  import tempfile
  import unittest
  from pathlib import Path
  import torch
  from test.generic.config_utils import get_distributed_launch_cmd, get_test_mlp_task_config
label_desc: Use image node_id 2 for calling the TestDistributedTrainer obj's underlying member method code with example usage: obj.tearDown() without return types