docstr: Remove everything created in setUpClass. 
docstr_tok: ["Remove","everything","created","in","setUpClass","."]
code: def tearDownClass(cls):
      """Remove everything created in setUpClass."""
      rmtree(cls._dataset_dir)
  
file_path: petastorm/petastorm/tests/test_metadata_read.py
imports: import os
  import unittest
  from shutil import move, rmtree
  from tempfile import mkdtemp
  from petastorm.tests.test_common import create_test_dataset
label_desc: Use image node_id 2 for calling the MetadataUnischemaReadTest obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types