Add feature flag to allow hiding the discussion tab for individual courses.

cms/envs/common.py

@@ -175,6 +175,9 @@ FEATURES = {
 
     # Enable credit eligibility feature
     'ENABLE_CREDIT_ELIGIBILITY': False,
+
+    # Can the visibility of the discussion tab be configured on a per-course basis?
+    'ALLOW_HIDING_DISCUSSION_TAB': False,
 }
 
 ENABLE_JASMINE = False

lms/djangoapps/django_comment_client/forum/views.py

@@ -58,6 +58,7 @@ class DiscussionTab(EnrolledTab):
     title = _('Discussion')
     priority = None
     view_name = 'django_comment_client.forum.views.forum_form_discussion'
+    is_hideable = settings.FEATURES.get('ALLOW_HIDING_DISCUSSION_TAB', False)
 
     @classmethod
     def is_enabled(cls, course, user=None):