'Scrap the assertions received from a IdP or an AA about a special
subject.
:param subject_id: The subjects identifier
:param entity_id: The identifier of the entity_id of the assertion
:return:'

def reset(self, subject_id, entity_id):

    if (not self._cache.set(_key(subject_id, entity_id), {}, 0)):
        raise CacheError('reset    failed')
