minor: Remove unused imports in test_giphy.py.
MODIFY
zulip_bots/zulip_bots/bots/giphy/test_giphy.py
zulip_bots/zulip_bots/bots/giphy/test_giphy.py
#!/usr/bin/env python
-from __future__ import absolute_import
-from __future__ import print_function
-
-import json
-
from unittest.mock import patch
from requests.exceptions import HTTPError, ConnectionError

minor: Remove unused imports in test_giphy.py.