code: def tearDownClass(cls):
      os.remove(cls.pwd_file.name)
      os.remove(cls.state_file.name)
      os.remove(cls.config_file.name)
      os.rmdir(cls.state_dir)
  
imports: import base64
  import json
  import os
  import tempfile
  import string
  from tornado.testing import AsyncHTTPTestCase
  from tabpy.tabpy_server.app.app import TabPyApp
  from tabpy.tabpy_server.handlers.util import hash_password
label_desc: Use image node_id 2 for calling the TestEvaluationPlaneHandlerWithAuth obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types