Remove unnecessary setUp function

This isn't doing anything, so let's remove it so it doesn't get
copy-pasted into new tests.

Change-Id: I209340cdd2913b557b49a29ea3a68138d0716a07

tests/unit/test_service.py

@@ -385,9 +385,6 @@ class LauncherTest(test_base.BaseTestCase):
 
 class ProcessLauncherTest(test_base.BaseTestCase):
 
-    def setUp(self):
-        super(ProcessLauncherTest, self).setUp()
-
     def test_stop(self):
         launcher = service.ProcessLauncher()
         self.assertTrue(launcher.running)