Removed unused imports

Change-Id: I203a1256cb4395ad330c19a14870171420daa065

run_tests.py

@@ -66,8 +66,6 @@ from nose import config
 from nose import core
 from nose import result
 
-from keystone.common.sql import util
-
 
 class _AnsiColorizer(object):
     """

tests/test_auth_token_middleware.py

@@ -15,7 +15,6 @@
 # under the License.
 
 import datetime
-import hashlib
 import iso8601
 import os
 import string
@@ -28,7 +27,6 @@ from keystone.common import utils
 from keystone.middleware import auth_token
 from keystone.openstack.common import jsonutils
 from keystone.openstack.common import timeutils
-from keystone import config
 from keystone import test
 
 

tests/test_backend_memcache.py

@@ -19,7 +19,6 @@ import uuid
 import memcache
 
 from keystone.common import utils
-from keystone import exception
 from keystone.openstack.common import timeutils
 from keystone import test
 from keystone.token.backends import memcache as token_memcache

tests/test_backend_pam.py

@@ -20,8 +20,6 @@ from keystone import config
 from keystone.identity.backends import pam as identity_pam
 from keystone import test
 
-import default_fixtures
-
 
 CONF = config.CONF