You do not need this mod after Cataclysm 1.99.3. If you still want to stick around version 1.99.2 and (possibly) below, please do the following.

Go to your config folder and open "cataclysm.toml", then change "AddedServerlist(on/off)" = true to false

This mod only does one thing and that it prevents the advertisement from the mod L_Ender's Cataclysm from showing up ever again if you have it installed. You still have to manually remove the server from the list. The said mod is hardcoded so that Purple Prison server will always be added to the server list so the only way to prevent this is to use mixin transformation.

I have made this mod specifically for my own mod pack because it is annoying to see PurplePrison server every time I open Minecraft to play. No modder should ever advertise a server by hardcoded server addition into their own mod, ever.

This mod requires L_Ender's Cataclysm. It is useless without it