docs: def cleanup(self, cluster):
          """Deletes the inventory file used last recently used.
  
          :param cluster: cluster to clear up inventory file for
          :type cluster: :py:class:`elasticluster.cluster.Cluster`
          """
          if self._storage_path and os.path.exists(self._storage_path):
              fname = '%s.%s' % (AnsibleSetupProvider.inventory_file_ending,
                                 cluster.name)
              inventory_path = os.path.join(self._storage_path, fname)
  
              if os.path.exists(inventory_path):
                  try:
                      os.unlink(inventory_path)
                      if self._storage_path_tmp:
                          if len(os.listdir(self._storage_path)) == 0:
                              shutil.rmtree(self._storage_path)
                  except OSError as ex:
                      log.warning(
                          "AnsibileProvider: Ignoring error while deleting "
                          "inventory file %s: %s", inventory_path, ex)