code: def tearDownClass(cls) -> None:
      shutil.rmtree(cls.URI_PATH.lstrip("file:"))
  
imports: import sys
  import shutil
  import unittest
  import pytest
  from pathlib import Path
  import qlib
  from qlib.config import C
  from qlib.utils import init_instance_by_config, flatten_dict
  from qlib.workflow import R
  from qlib.workflow.record_temp import SignalRecord, SigAnaRecord, PortAnaRecord
  from qlib.tests import TestAutoData
  from qlib.tests.config import CSI300_GBDT_TASK, CSI300_BENCH
label_desc: Use image node_id 1 for calling the TestAllFlow obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types