code: def tearDown(self):
      cache_name = os.path.join(self.data_dir, self.cache_name)
      if os.path.exists(cache_name):
          os.remove(cache_name)
  
imports: import io
  import os
  import shutil
  import unittest
  from test import test_dir_path
  import pandas
  from nose.tools import *
  import torch
  from deepmatcher.data.dataset import *
  from deepmatcher.data.field import FastText, MatchingField
  from deepmatcher.data.process import _make_fields, process
  from torchtext.utils import unicode_csv_reader
  from urllib.parse import urljoin
  from urllib.request import pathname2url
label_desc: Use image node_id 2 for calling the MatchingDatasetSplitsTestCases obj's underlying member method code with example usage: obj.tearDown() without return types