code: def tearDown(self):
      shutil.rmtree(local_path)
  
imports: import os
  import tarfile
  import tempfile
  import shutil
  from unittest import TestCase
  import numpy
  from bigdl.dllib.feature.dataset.base import maybe_download
  from bigdl.dllib.nncontext import init_nncontext
  from bigdl.orca.data import SparkXShards
  from bigdl.orca.learn.openvino import Estimator
label_desc: Use image node_id 2 for calling the TestEstimatorForOpenVINO obj's underlying member method code with example usage: obj.tearDown() without return types