Revert "12/21 modernizations from TG live"

code/controllers/subsystem/icon_smooth.dm

@@ -16,7 +16,7 @@ var/datum/subsystem/icon_smooth/SSicon_smooth
 	while(smooth_queue.len)
 		var/atom/A = smooth_queue[smooth_queue.len]
 		smooth_queue.len--
-		smooth_icon(A)
+		ss_smooth_icon(A)
 		if (MC_TICK_CHECK)
 			return
 	if (!smooth_queue.len)
@@ -25,12 +25,8 @@ var/datum/subsystem/icon_smooth/SSicon_smooth
 /datum/subsystem/icon_smooth/Initialize()
 	smooth_zlevel(1,TRUE)
 	smooth_zlevel(2,TRUE)
-	var/queue = smooth_queue
-	smooth_queue = list()
-	for(var/V in queue)
+	for(var/V in smooth_queue)
 		var/atom/A = V
-		if(!A || A.z <= 2)
-			continue
-		smooth_icon(A)
-
+		if(A.z == 1 || A.z == 2)
+			smooth_queue -= A
 	..()