code: def execute(self):
          
          self.print_info()
  
          if not self._config.provisioner.playbooks.cleanup:
              msg = 'Skipping, cleanup playbook not configured.'
              LOG.warn(msg)
              return
  
          self._config.provisioner.cleanup()
docs: Execute the actions necessary to cleanup the instances and returns
          None.
  
          :return: None