noop: remove a few unused imports in tests

tests/test_protocol.py

@@ -7,7 +7,6 @@ from unittest import skip
 from unittest.mock import patch
 
 from arroba.tests.testutil import dns_answer
-from cachetools import LRUCache, TTLCache
 from google.cloud import ndb
 from google.cloud.ndb.global_cache import _InProcessGlobalCache
 from granary import as2

tests/test_redirect.py

@@ -11,7 +11,6 @@ from oauth_dropins.webutil.testutil import requests_response
 from . import testutil
 
 from flask_app import app
-from google.cloud.ndb.global_cache import _InProcessGlobalCache
 from models import Object
 import protocol
 from web import Web