mypy: Fix an unnecessary duplicate type declaration.

zerver/tests/test_narrow.py

@@ -962,7 +962,7 @@ class GetOldMessagesTest(ZulipTestCase):
             anchor=next_message_id,
             num_after=10,
             num_before=0,
-        ))  # type: Dict[str, Dict]
+        ))
         self.assertEqual(len(result['messages']), 4)
         messages = result['messages']
 
@@ -983,7 +983,6 @@ class GetOldMessagesTest(ZulipTestCase):
             english_message['match_content'],
             u'<p>I want to go to <span class="highlight">日本</span>!</p>')
 
-
     @override_settings(USING_PGROONGA=False)
     def test_get_messages_with_search_not_subscribed(self):
         # type: () -> None