Merge pull request #9355 from Firecage/OverlaycleanBGone

Removes the ability to clean Overlays

code/game/objects/structures/janicart.dm

@@ -185,7 +185,7 @@
 				F.dirt = 0
 			for(var/A in tile)
 				if(istype(A, /obj/effect))
-					if(istype(A, /obj/effect/rune) || istype(A, /obj/effect/decal/cleanable) || istype(A, /obj/effect/overlay))
+					if(is_cleanable(A))
 						qdel(A)
 
 /obj/structure/stool/bed/chair/janicart/examine(mob/user)

code/game/objects/structures/watercloset.dm

@@ -307,7 +307,7 @@
 		var/turf/tile = loc
 		loc.clean_blood()
 		for(var/obj/effect/E in tile)
-			if(istype(E,/obj/effect/rune) || istype(E,/obj/effect/decal/cleanable) || istype(E,/obj/effect/overlay))
+			if(is_cleanable(E))
 				qdel(E)