code: def tearDownClass(cls):
      shutil.rmtree(cls.tempdir)
  
imports: import sys
  import os
  import shlex
  import shutil
  import warnings
  import subprocess
  import unittest
  import mpi4py
label_desc: Use image node_id 2 for calling the TestRunDirectory obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types