fix: Fixed new pylint warnings (#28724)

cms/djangoapps/contentstore/rest_api/v0/tests/test_tabs.py

@@ -229,7 +229,7 @@ class TabsAPITests(CourseTestCase):
     @ddt.data(
         dict(is_hidden=None),
         dict(is_hidden="abc"),
-        dict(),
+        {},
     )
     def test_toggle_tab_invalid_visibility(self, invalid_visibility):
         """

cms/djangoapps/contentstore/tests/test_course_settings.py

@@ -718,7 +718,7 @@ class CourseGradingTest(CourseTestCase):
                     'event_transaction_id': 'mockUUID',
                     'event_transaction_type': 'edx.grades.grading_policy_changed',
                 }
-            ) for policy_hash in {grading_policy_2, grading_policy_3}
+            ) for policy_hash in [grading_policy_2, grading_policy_3]
         ], any_order=True)
 
     @mock.patch('common.djangoapps.track.event_transaction_utils.uuid4')