Removes Atmos Grenades from Surplus

Getting a grenade set you can RARELY use due to server rules is just terrible. The same reason why the singularity beacon was removed from surplus. It prevents mass destruction because of people thinking "I got it from surplus so its fine to use I guess".

code/datums/uplink_item.dm

@@ -500,6 +500,7 @@ var/list/uplink_items = list()
 	reference = "AGG"
 	item = /obj/item/storage/box/syndie_kit/atmosgasgrenades
 	cost = 11
+	surplus = 0
 
 /datum/uplink_item/dangerous/emp
 	name = "EMP Grenades and Implanter Kit"