Fixes #10170.

Removes the bunsen burner completely. Was after the chem rework basically never referenced anyway.

code/modules/research/xenoarchaeology/tools/bunsen_burner.dm

@@ -1,59 +0,0 @@
-
-/obj/machinery/bunsen_burner
-	name = "bunsen burner"
-	desc = "A flat, self-heating device designed for bringing chemical mixtures to boil."
-	icon = 'icons/obj/device.dmi'
-	icon_state = "bunsen0"
-	var/heating = 0		//whether the bunsen is turned on
-	var/heated = 0		//whether the bunsen has been on long enough to let stuff react
-	var/obj/item/weapon/reagent_containers/held_container
-	var/heat_time = 50
-
-/obj/machinery/bunsen_burner/attackby(obj/item/weapon/W as obj, mob/user as mob)
-	if(istype(W, /obj/item/weapon/reagent_containers))
-		if(held_container)
-			user << "\red You must remove the [held_container] first."
-		else
-			held_container = W
-			user.drop_from_inventory(held_container, src)
-			user << "\blue You put the [held_container] onto the [src]."
-			var/image/I = image("icon"=W, "layer"=FLOAT_LAYER)
-			underlays += I
-			if(heating)
-				spawn(heat_time)
-					try_heating()
-	else
-		user << "\red You can't put the [W] onto the [src]."
-        
-/obj/machinery/bunsen_burner/attack_ai()
-    return
-
-/obj/machinery/bunsen_burner/attack_hand(mob/user as mob)
-	if(held_container)
-		underlays = null
-		user << "\blue You remove the [held_container] from the [src]."
-		held_container.loc = src.loc
-		held_container.attack_hand(user)
-		held_container = null
-	else
-		user << "\red There is nothing on the [src]."
-
-/obj/machinery/bunsen_burner/proc/try_heating()
-	src.visible_message("\blue \icon[src] [src] hisses.")
-	if(held_container && heating)
-		heated = 1
-		held_container.reagents.handle_reactions()
-		heated = 0
-		spawn(heat_time)
-			try_heating()
-
-/obj/machinery/bunsen_burner/verb/toggle()
-	set src in view(1)
-	set name = "Toggle bunsen burner"
-	set category = "IC"
-
-	heating = !heating
-	icon_state = "bunsen[heating]"
-	if(heating)
-		spawn(heat_time)
-			try_heating()