Make sure there are no unused import

Remove all currently unused imports
Prevent future unused imports

Change-Id: I6ac26d5c71b79952a7732db300355a00310c712e

nova/tests/baremetal/test_nova_baremetal_manage.py

@@ -20,10 +20,6 @@ import imp
 import os
 import sys
 
-from nova import context
-from nova import test
-from nova.virt.baremetal import db as bmdb
-
 from nova.tests.baremetal.db import base as bm_db_base
 
 TOPDIR = os.path.normpath(os.path.join(

nova/tests/baremetal/test_pxe.py

@@ -21,12 +21,10 @@
 
 import os
 
-import mox
 from testtools import matchers
 
 from nova import exception
 from nova.openstack.common import cfg
-from nova import test
 from nova.tests.baremetal.db import base as bm_db_base
 from nova.tests.baremetal.db import utils as bm_db_utils
 from nova.tests.image import fake as fake_image

nova/tests/baremetal/test_utils.py

@@ -18,12 +18,9 @@
 
 """Tests for baremetal utils."""
 
-import mox
-
 import errno
 import os
 
-from nova import exception
 from nova import test
 from nova.virt.baremetal import utils
 

nova/tests/test_periodic_tasks.py

@@ -17,7 +17,6 @@
 
 import time
 
-import fixtures
 from testtools import matchers
 
 from nova import manager

nova/tests/test_virt_drivers.py

@@ -119,8 +119,6 @@ class _FakeDriverBackendTestCase(object):
 
     def _teardown_fakelibvirt(self):
         # Restore libvirt
-        import nova.virt.libvirt.driver
-        import nova.virt.libvirt.firewall
         if self.saved_libvirt:
             sys.modules['libvirt'] = self.saved_libvirt