code: def tearDown(self):
      shutil.rmtree(self._test_dir)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import shutil
  import six
  import tempfile
  from absl.testing import absltest
  import numpy
  import deepmind_lab
label_desc: Use image node_id 2 for calling the LevelCacheTest obj's underlying member method code with example usage: obj.tearDown() without return types