User blog comment:BertH/User rights updates for Forum and Message Wall/@comment-4129195-20150120185304/@comment-5558012-20150120190319

You can't manage forum or message walls if you don't have them enabled (so even if the right isn't disabled and these features are disabled, you couldn't do anything with it).

Moderators have the rights above and your custom user rights group has the rights that were asked at that request for the custom group. If they serve the same purpose, you should probably follow the advice of the blog and ask for the custom group to be removed.