'Removing something not in the set should silently do nothing'

@execute_count(3)
def test_set_remove_new_record(self):

    partition = uuid4()
    cluster = 1
    TestQueryUpdateModel.objects.create(partition=partition, cluster=cluster, text_set=set(('foo',)))
    TestQueryUpdateModel.objects(partition=partition, cluster=cluster).update(text_set__remove=set(('afsd',)))
    obj = TestQueryUpdateModel.objects.get(partition=partition, cluster=cluster)
    self.assertEqual(obj.text_set, set(('foo',)))
