code: def remove_filter(self, server_id, filter_path):
          
  
          # Validate server_id
          server = self._get_server(server_id)
          conn_id = server.conn.conn_id if server.conn is not None else None
  
          # Verify referencing subscriptions.
          ref_paths = server.conn.ReferenceNames(
              filter_path, ResultClass=SUBSCRIPTION_CLASSNAME)
          if ref_paths:
              # DSP1054 1.2 defines that this CIM error is raised by the server
              # in that case, so we simulate that behavior on the client side.
              raise CIMError(
                  CIM_ERR_FAILED,
                  "The indication filter is referenced by subscriptions.",
                  conn_id=conn_id)
  
          server.conn.DeleteInstance(filter_path)
  
          inst_list = self._owned_filters[server_id]
          # We iterate backwards because we change the list
          for i in six.moves.range(len(inst_list) - 1, -1, -1):
              inst = inst_list[i]
              if inst.path == filter_path:
                  del inst_list[i]
docs: Remove an indication filter from a WBEM server, by deleting the
          indication filter instance in the WBEM server.
  
          The indication filter must be owned or permanent (i.e. not static).
  
          This method verifies that there are not currently any subscriptions on
          the specified indication filter, in order to handle server
          implementations that do not ensure that on the server side as required
          by :term:`DSP1054`.
  
          Parameters:
  
            server_id (:term:`string`):
              The server ID of the WBEM server, returned by
              :meth:`~pywbem.WBEMSubscriptionManager.add_server`.
  
            filter_path (:class:`~pywbem.CIMInstanceName`):
              Instance path of the indication filter instance in the WBEM
              server.
  
          Raises:
  
              Exceptions raised by :class:`~pywbem.WBEMConnection`.
              CIMError: CIM_ERR_FAILED, if there are referencing subscriptions.