Revert "Expand ConfirmEdit disabling test to all group0 wikis"

MediaWiki.org is being run over by Spam right now.

This reverts commit d47b9e06bc46e3fefe40b9d4cba7510faafa8e43.

Change-Id: Ic7aab5300d0438da453d9e80d3d0b82c7cc40ed1
Merge "Revert "Expand ConfirmEdit disabling test to all group0 wikis""