Update: Looks like I can't delete the wiki directly! (I think this is for good reason; on a case by case basis - so that eg, rogue admins can't take their community hostage or whatever).
Have made an official request to wikia to delete it, opening ticket #349088 on their system. It should hopefully be deleted within 2 business days. Wikia wiki is currently over here, but should hopefully disappear soon: [http://nim-lang.wikia.com/wiki/The_Nim_programming_language_Wiki](http://nim-lang.wikia.com/wiki/The_Nim_programming_language_Wiki)