Was the cleanse mechanic ever added?

I'm creating a mob that gives the targets several potion debuffs over the course of the battle. My idea is that upon death, the mob will clear all debuffs it had given to the players. After doing a bit of digging, I found this http://www.mythicmobs.net/index.php?threads/suggestion-cleanse-potionremove-mechanic.1774/, and I was wondering if it was ever actually implemented because it isn't on the Manual.

Thanks!