code: def tearDown(self):
      if self.absolute_local_dir is not None:
          shutil.rmtree(self.absolute_local_dir, ignore_errors=True)
          self.absolute_local_dir = None
      ray.shutdown()
  
imports: import os
  import pickle
  import shutil
  import tempfile
  import unittest
  import pytest
  import ray
  from ray import tune
  from ray.train import CheckpointConfig
  from ray.tune import Trainable
  from ray.tune.utils import validate_save_restore
label_desc: Use image node_id 3 for calling the SerialTuneRelativeLocalDirTest obj's underlying member method code with example usage: obj.tearDown() without return types