fix: removed extra code

Author: AhtishamShahid

openedx/core/djangoapps/notifications/handlers.py

@@ -24,10 +24,6 @@
 User = get_user_model()
 log = logging.getLogger(__name__)
 
-# Notification type emitted by ora2 on submission for ORAs with peer/self review steps.
-# This type is used only as a trigger; it is not stored as a notification itself.
-ORA_SUBMISSION_NOTIFICATION_TYPE = 'ora_submission_created'
-
 AUDIENCE_FILTER_CLASSES = {
     'discussion_roles': ForumRoleAudienceFilter,
     'course_roles': CourseRoleAudienceFilter,