clean unused imports

Change-Id: I9db0bbe3d24fb04e647fcfca1a3a746df006f85c

horizon/management/commands/startpanel.py

@@ -11,7 +11,6 @@
 # under the License.
 
 import glob
-from optparse import make_option  # noqa
 import os
 
 from django.core.management.base import CommandError  # noqa

openstack_dashboard/dashboards/admin/instances/tests.py

@@ -18,7 +18,6 @@ import uuid
 from django.core.urlresolvers import reverse
 from django import http
 
-from mox3.mox import IgnoreArg  # noqa
 from mox3.mox import IsA  # noqa
 
 from openstack_dashboard import api

openstack_dashboard/dashboards/project/network_topology/tests.py

@@ -16,7 +16,6 @@ from django.core.urlresolvers import reverse
 from django import http
 import django.test
 
-from mox3.mox import IgnoreArg  # noqa
 from mox3.mox import IsA  # noqa
 from oslo_serialization import jsonutils
 

openstack_dashboard/dashboards/project/volumes/backups/tables.py

@@ -11,7 +11,6 @@
 # under the License.
 
 from django.core.urlresolvers import reverse
-from django.template.defaultfilters import title  # noqa
 from django.utils import html
 from django.utils import http
 from django.utils import safestring

openstack_dashboard/dashboards/settings/user/forms.py

@@ -13,7 +13,6 @@
 #    under the License.
 
 from datetime import datetime  # noqa
-from datetime import timedelta  # noqa
 import string
 
 import babel

openstack_dashboard/usage/tables.py

@@ -12,7 +12,6 @@
 
 from django.core import urlresolvers
 from django.template.defaultfilters import floatformat  # noqa
-from django.template.defaultfilters import timesince  # noqa
 from django.utils.translation import ugettext_lazy as _
 
 from horizon import tables