code: def tearDown(self):
      registry.unregister("config")
  
file_path: mmf/tests/trainers/callbacks/test_user_callback.py
imports: import argparse
  import os
  import unittest
  from copy import deepcopy
  import torch
  from mmf.common.registry import registry
  from mmf.trainers.callbacks.lr_scheduler import LRSchedulerCallback
  from mmf.utils.configuration import load_yaml
  from omegaconf import OmegaConf
  from tests.test_utils import NumbersDataset, SimpleModel
label_desc: Use image node_id 2 for calling the TestUserCallback obj's underlying member method code with example usage: obj.tearDown() without return types