docstr: Drop the tables in the database after each test is run.
code: def tearDown(self):
      """
      Drop the tables in the database after each test is run.
      """
      self.adapter.drop()
  
imports: from unittest import TestCase
  from chatterbot.conversation import Statement
  from chatterbot.storage.sql_storage import SQLStorageAdapter
label_desc: Use image node_id 2 for calling the SQLStorageAdapterTestCase obj's underlying member method code with example usage: obj.tearDown() without return types