makes all Destroy()'s return properly

code/game/objects/effects/effect_system/effect_system.dm

@@ -38,7 +38,7 @@ would spawn and follow the beaker, even if it is carried or thrown.
 /datum/effect/effect/system/Destroy()
 	holder = null
 	location = null
-	..()
+	return ..()
 
 /datum/effect/effect/system/proc/set_up(n = 3, c = 0, turf/loc)
 	if(n > 10)

code/game/objects/effects/effect_system/effects_foam.dm

@@ -194,7 +194,7 @@
 /obj/structure/foamedmetal/Destroy()
 	density = 0
 	air_update_turf(1)
-	..()
+	return ..()
 
 
 /obj/structure/foamedmetal/Move()

code/game/objects/effects/effect_system/effects_smoke.dm

@@ -36,7 +36,7 @@
 
 /obj/effect/effect/smoke/Destroy()
 	SSobj.processing.Remove(src)
-	..()
+	return ..()
 
 /obj/effect/effect/smoke/proc/kill_smoke()
 	SSobj.processing.Remove(src)
@@ -192,8 +192,7 @@
 
 /datum/effect/effect/system/smoke_spread/chem/Destroy()
 	chemholder = null
-	..()
-	return QDEL_HINT_PUTINPOOL
+	return ..()
 
 /datum/effect/effect/system/smoke_spread/chem/set_up(datum/reagents/carry = null, n = 5, c = 0, loca, direct, silent = 0)
 	if(n > 20)