code: def tearDownClass(cls):
      for _, dir_path in cls.onnx_model_dirs.items():
          if isinstance(dir_path, dict):
              for _, sec_dir_path in dir_path.items():
                  shutil.rmtree(sec_dir_path)
          else:
              shutil.rmtree(dir_path)
  
file_path: optimum/tests/onnxruntime/utils_onnxruntime_tests.py
imports: import shutil
  import tempfile
  import unittest
  from typing import Dict
  import numpy
  import torch
  from transformers import set_seed
  from optimum.exporters import TasksManager
label_desc: Use image node_id 3 for calling the ORTModelTestMixin obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types