Removes plasteel from drones and borgs.

code/game/objects/items/stacks/sheets/sheet_types.dm

@@ -131,7 +131,7 @@ var/global/list/datum/stack_recipe/plasteel_recipes = list ( \
 	throwforce = 10.0
 	flags = CONDUCT
 	origin_tech = "materials=2"
-
+/* Just in case we ever decide to use it
 /obj/item/stack/sheet/plasteel/cyborg
 	name = "plasteel"
 	singular_name = "plasteel sheet"
@@ -141,7 +141,7 @@ var/global/list/datum/stack_recipe/plasteel_recipes = list ( \
 	materials = list()
 	throwforce = 10.0
 	flags = CONDUCT
-
+*/
 /obj/item/stack/sheet/plasteel/New(var/loc, var/amount=null)
 	recipes = plasteel_recipes
 	return ..()

code/game/objects/items/stacks/stack.dm

@@ -34,10 +34,6 @@
 /obj/item/stack/attack_self(mob/user as mob)
 	list_recipes(user)
 
-/obj/item/stack/sheet/plasteel/cyborg/attack_self(mob/user as mob)
-	user << "<span class='warning'>You lack the subroutines necessary to build more complex structures with that material.</span>"
-	return
-
 /obj/item/stack/proc/list_recipes(mob/user as mob, recipes_sublist)
 	if (!recipes)
 		return