code: def tearDown(self):
      file_io.delete_recursively(self._base_dir)
      super().tearDown()
  
imports: import os
  from unittest import mock
  import tensorflow
  from tfx.dsl.io import fileio
  from tfx.utils import io_utils
  from tensorflow.python.lib.io import file_io
label_desc: Use image node_id 7 for calling the IoUtilsTest obj's underlying member method code with example usage: obj.tearDown() without return types