old_contents: #!/usr/bin/env python
  # encoding: utf-8
  
  from __future__ import absolute_import, print_function, unicode_literals
  
  import signal
  import traceback
  import unittest
  
  from tests import utils as test_utils
  
  
  def main():
      try:
          import faulthandler
          faulthandler.register(signal.SIGUSR1, all_threads=True)
          print('Installed SIGUSR1 handler to print stack traces: pkill -USR1 -f run-tests')
      except ImportError:
          pass
  
      test_utils.prepare()
      test_utils.start_solr()
  
      try:
          unittest.main(module='tests', verbosity=1)
      finally:
          print('Tests complete; halting Solr servers…')
          test_utils.stop_solr()
  
  
  if __name__ == "__main__":
      main()
  
new_contents: #!/usr/bin/env python
  # encoding: utf-8
  
  from __future__ import absolute_import, print_function, unicode_literals
  
  import signal
  import unittest
  
  from tests import utils as test_utils
  
  
  def main():
      try:
          import faulthandler
          faulthandler.register(signal.SIGUSR1, all_threads=True)
          print('Installed SIGUSR1 handler to print stack traces: pkill -USR1 -f run-tests')
      except ImportError:
          pass
  
      test_utils.prepare()
      test_utils.start_solr()
  
      try:
          unittest.main(module='tests', verbosity=1)
      finally:
          print('Tests complete; halting Solr servers…')
          test_utils.stop_solr()
  
  
  if __name__ == "__main__":
      main()
  
subject: Remove unused import