code: def cleanup(self, docker_file):
      mock.patch.stopall()
      os.remove(docker_file)
  
imports: import os
  import tempfile
  import uuid
  from absl.testing import absltest
  import docker
  import mock
  from tensorflow_cloud.core import containerize
  from tensorflow_cloud.core import docker_config
  from tensorflow_cloud.core import gcp
  from tensorflow_cloud.core import machine_config
  from tensorflow_cloud.utils import google_api_client
  from tensorflow_cloud.utils import tf_utils
label_desc: Use image node_id 2 for calling the TestContainerize obj's underlying member method code with example usage: obj.cleanup(docker_file) without return types