Remove unnecessary setUp

setUp will be automatically called around each
testcase, so this is to remove setUp that doing
nothing additional than super to keep code clean.

Change-Id: I8ce1dd0cc0cbba760caa6df6516b300622bb67fe

ironic/tests/unit/api/v1/test_root.py

@@ -21,9 +21,6 @@ from ironic.tests.unit.api import base as api_base
 
 
 class TestV1Routing(api_base.BaseApiTest):
-    def setUp(self):
-        super(TestV1Routing, self).setUp()
-
     def test_route_checks_version(self):
         self.get_json('/')
         self._check_version.assert_called_once_with(mock.ANY,

ironic/tests/unit/drivers/modules/test_inspector.py

@@ -25,9 +25,6 @@ from ironic.tests.unit.objects import utils as obj_utils
 
 
 class DisabledTestCase(db_base.DbTestCase):
-    def setUp(self):
-        super(DisabledTestCase, self).setUp()
-
     def _do_mock(self):
         # NOTE(dtantsur): fake driver always has inspection, using another one
         mgr_utils.mock_the_extension_manager("pxe_ssh")