You can delete a page easily in MindTouch through the Page Options menu.
Delete a page
To delete a page, navigate to the page you want to delete and the click on Page Options -> Delete page
You'll be presented with the following dialog:
If you want to delete the subpages then check the box next to Delete all children of this page as well and then click Delete page.
Restoring Deleted pages
If you accidently deleted a page or set of pages, you can restore them by going into the Deleted pages section in the Control Panel.
1.) Click on Site Tools and then Control Panel when the drop down menu appears.
2.) Once in the control panel select Deleted Pages under the Maintenance and & History section.
3.) To the right of the page you desire restoration click on Restore.
4.) After the page load click on Restore at the top of the page and your deleted page should be by completely back to normal (Also it's subpages if you restored a page that had deleted articles too).