hi brad,
Sorry for the delay on helping you out. I can remove the wikipages that you do not wish to live in public view any longer. I checked out the group page and it appears that the problem has been solved. You can contact me directly the next time you need assistance.

Otherwise, the answer is Editor's of WiserEarth have the ability to change the status of pages. If you are an editor you will see a drop down bar in the bottom right corner of the page. In order to maintain transparency with all users, nothing that is created can be "deleted". Instead the setting of a page you wish to get rid of is "removed". The pages that have been removed are still viewable by Editors and Admins of WE but to the rest of the users it will appear that they have been deleted.