old_contents: # -*- coding: utf-8 -*-
  '''
  A simple test engine, not intended for real use but as an example
  '''
  # Import python libs
  import time
  
  # Import salt libs
  import salt.utils.event
  
  # Import python libs
  import json
  import logging
  
  log = logging.getLogger(__name__)
  
  
  def start():
      '''
      Do something from time to time
      '''
      while True:
          log.debug('.')
          time.sleep(5)
  
new_contents: # -*- coding: utf-8 -*-
  '''
  A simple test engine, not intended for real use but as an example
  '''
  # Import python libs
  import time
  
  # Import python libs
  import logging
  
  log = logging.getLogger(__name__)
  
  
  def start():
      '''
      Do something from time to time
      '''
      while True:
          log.debug('.')
          time.sleep(5)
  
subject: remove unused imports