Unused imports in test files.

test/test_auth.py

@@ -28,7 +28,7 @@ sys.path[0:0] = [""]
 
 from pymongo import MongoClient
 from pymongo.auth import HAVE_KERBEROS, _build_credentials_tuple
-from pymongo.errors import OperationFailure, ConfigurationError
+from pymongo.errors import OperationFailure
 from pymongo.read_preferences import ReadPreference
 from test import client_context, host, port, SkipTest, unittest, Version
 

test/test_collection.py

@@ -26,7 +26,6 @@ import warnings
 
 sys.path[0:0] = [""]
 
-from bson.binary import Binary
 from bson.regex import Regex
 from bson.code import Code
 from bson.dbref import DBRef

test/test_json_util.py

@@ -34,7 +34,7 @@ from bson.son import RE_TYPE
 from bson.timestamp import Timestamp
 from bson.tz_util import utc
 
-from test import client_context, SkipTest, unittest, IntegrationTest
+from test import SkipTest, unittest, IntegrationTest
 
 PY3 = sys.version_info[0] == 3
 

test/test_monitor.py

@@ -16,7 +16,6 @@
 
 import gc
 import sys
-import time
 from functools import partial
 
 sys.path[0:0] = [""]