'Check result of removing subscriptions.
Unlike adding subscriptions, you can only remove subscriptions
for yourself, so the result format is different.
{"msg": "",
"removed": ["Denmark", "Scotland", "Verona"],
"not_subscribed": ["Rome"], "result": "success"}'

def helper_check_subs_before_and_after_remove(self, subscriptions, json_dict, email, new_subs, realm):

    result = self.client_delete('/json/users/me/subscriptions', {'subscriptions': ujson.dumps(subscriptions)})
    self.assert_json_success(result)
    json = ujson.loads(result.content)
    for (key, val) in six.iteritems(json_dict):
        self.assertEqual(sorted(val), sorted(json[key]))
    new_streams = self.get_streams(email, realm)
    self.assertEqual(sorted(new_streams), sorted(new_subs))
