code: def prune(self):
          
          LOG.info('Pruning extra files from scenario ephemeral directory')
          safe_files = [
              self.config.provisioner.config_file,
              self.config.provisioner.inventory_file,
              self.config.state.state_file,
          ] + self.config.driver.safe_files
          files = util.os_walk(self.ephemeral_directory, '*')
          for f in files:
              if not any(sf for sf in safe_files if fnmatch.fnmatch(f, sf)):
                  os.remove(f)
  
          # Remove empty directories.
          for dirpath, dirs, files in os.walk(
                  self.ephemeral_directory, topdown=False):
              if not dirs and not files:
                  os.removedirs(dirpath)
docs: Prune the scenario ephemeral directory files and returns None.
  
          "safe files" will not be pruned, including the ansible configuration
          and inventory used by this scenario, the scenario state file, and
          files declared as "safe_files" in the ``driver`` configuration
          declared in ``molecule.yml``.
  
          :return: None