Removes bear traps from the custodial closet, adds autolathe recipe

code/game/machinery/autolathe_datums.dm

@@ -391,6 +391,12 @@
 	hidden = 1
 	category = "Devices and Components"
 
+/datum/autolathe/recipe/beartrap
+	name = "mechanical trap"
+	path = /obj/item/weapon/beartrap
+	hidden = 1
+	category = "Devices and Components"
+
 /datum/autolathe/recipe/welder_industrial
 	name = "industrial welding tool"
 	path = /obj/item/weapon/weldingtool/largetank

code/game/objects/items/weapons/traps.dm

@@ -9,6 +9,7 @@
 	throwforce = 0
 	w_class = 3
 	origin_tech = "materials=1"
+	matter = list(DEFAULT_WALL_MATERIAL = 18750)
 	var/deployed = 0
 
 /obj/item/weapon/beartrap/suicide_act(mob/user)