Pretty simple mod. It does two things, and does those things well:

• It prevents anything that belongs to the enemy force (biters, biter bases and worms in vanilla) from spawning on map chunk generation, by removing autoplace's peaks from their prototypes.
• When first loading a save, either new or existing, it erases all enemy forces already in the map.

Basically, all biters go kapoot and no new ones will ever spawn while this mod is active. And because the map settings are left alone, disabling or removing "Biters Begone!" will restore biter spawning without any future side-effects. Neat!

Hope you like it KoS!