Author: David Mudrák
MDL-66118 hub: Replace the unregister form with a confirmation
Now that unpublishalladvertisedcourses and unpublishalluploadedcourses
became irrelevant, there is no reason for an empty form.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=254b57937501d7cd7ec6eadbadff5d9f3083d00a
http://github.com/moodle/moodle/commit/254b57937501d7cd7ec6eadbadff5d9f3083d00a
+ 3.8 en [registerwithmoodleorgremove,core_hub]