code: def tearDown(self):
      if path.isfile(self.output):
          remove(self.output)
  
file_path: auptimizer/tests/dlconvert/test_checkpoint_to_onnx.py
imports: import unittest
  import sys
  from absl import flags
  from os import path, remove
  from six import PY2
  import json
  from tensorflow import __version__
  from tensorflow.python.util import deprecation
label_desc: Use image node_id 3 for calling the CheckpointToOnnxTestCase obj's underlying member method code with example usage: obj.tearDown() without return types