Minor fixes of test_system in xmodule tests

common/lib/xmodule/xmodule/tests/test_progress.py

@@ -134,6 +134,6 @@ class ModuleProgressTest(unittest.TestCase):
     '''
     def test_xmodule_default(self):
         '''Make sure default get_progress exists, returns None'''
-        xm = x_module.XModule(test_system, 'a://b/c/d/e', None, {})
+        xm = x_module.XModule(test_system(), 'a://b/c/d/e', None, {})
         p = xm.get_progress()
         self.assertEqual(p, None)

common/lib/xmodule/xmodule/tests/test_randomize_module.py

@@ -14,7 +14,6 @@ START = '2013-01-01T01:00:00'
 
 
 from .test_course_module import DummySystem as DummyImportSystem
-from . import test_system
 
 
 class RandomizeModuleTestCase(unittest.TestCase):