@abc.abstractmethod<EOL><INDENT>def deleted_proficiencies(self, notification_id, proficiency_ids):<DEDENT>
pass<EOL>
The callback for notification of deleted proficiencies.

        :param notification_id: the notification ``Id``
        :type notification_id: ``osid.id.Id``
        :param proficiency_ids: the ``Ids`` of the deleted ``Proficiencies``
        :type proficiency_ids: ``osid.id.IdList``


        *compliance: mandatory -- This method must be implemented.*