code: def tearDownClass(cls):
      cls.remove_tempdir()
      cls.tear_down_env()
  
imports: import contextlib
  import logging
  import shutil
  import sys
  import tempfile
  import unittest
  from io import StringIO
  import pytest
  from xgboost import testing
  from pyspark.sql import SparkSession
  from xgboost.spark.utils import _get_default_params_from_func
label_desc: Use image node_id 2 for calling the SparkLocalClusterTestCase obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types