Fix imports in test_read_preferences.

Author: behackett

test/test_read_preferences.py

@@ -22,7 +22,6 @@
 
 from bson.py3compat import MAXSIZE
 from bson.son import SON
-from pymongo.cursor import _QUERY_OPTIONS
 from pymongo.errors import ConfigurationError
 from pymongo.message import _maybe_add_read_preference
 from pymongo.mongo_client import MongoClient
@@ -35,15 +34,14 @@
 from pymongo.write_concern import WriteConcern
 
 from test.test_replica_set_client import TestReplicaSetClientBase
-from test import (client_context,
+from test import (SkipTest,
+ client_context,
  host,
  port,
  unittest,
- utils,
- IntegrationTest,
  db_user,
  db_pwd)
-from test.utils import connected, single_client, one, wait_until, rs_client
+from test.utils import single_client, one, wait_until, rs_client
 from test.version import Version