old_contents: import unittest
  
  class TestImport(unittest.TestCase):
      # Basic import tests for packages without any.
      def test_basic(self):
          import bq_helper
          import cleverhans
          from rl.agents.dqn import DQNAgent
  
new_contents: import unittest
  
  class TestImport(unittest.TestCase):
      # Basic import tests for packages without any.
      def test_basic(self):
          import bq_helper
          import cleverhans
  
subject: Remove import test for keras-rl