Replace global all_areas list with world.

It ends up having similar performance, so might as well not bother with all_areas.

code/game/area/areas.dm

@@ -46,8 +46,6 @@
 
 /area/New()
 	uid = ++global_uid
-	all_areas += src //Replace with /area in world? Byond optimizes X in world loops.
-	
 	..()
 
 /area/Initialize()
@@ -389,7 +387,7 @@ var/list/mob/living/forced_ambiance_list = new
 var/list/teleportlocs = list()
 
 /hook/startup/proc/setupTeleportLocs()
-	for(var/area/AR in all_areas)
+	for(var/area/AR in world)
 		if(istype(AR, /area/shuttle) || istype(AR, /area/syndicate_station) || istype(AR, /area/wizard_station)) continue
 		if(teleportlocs.Find(AR.name)) continue
 		var/turf/picked = pick(get_area_turfs(AR.type))
@@ -404,7 +402,7 @@ var/list/teleportlocs = list()
 var/list/ghostteleportlocs = list()
 
 /hook/startup/proc/setupGhostTeleportLocs()
-	for(var/area/AR in all_areas)
+	for(var/area/AR in world)
 		if(ghostteleportlocs.Find(AR.name)) continue
 		if(istype(AR, /area/aisat) || istype(AR, /area/derelict) || istype(AR, /area/tdome) || istype(AR, /area/shuttle/specops/centcom))
 			ghostteleportlocs += AR.name

code/game/gamemodes/cult/hell_universe.dm

@@ -54,7 +54,7 @@ In short:
 
 
 /datum/universal_state/hell/proc/AreaSet()
-	for(var/area/A in all_areas)
+	for(var/area/A in world)
 		if(!istype(A,/area) || istype(A, /area/space))
 			continue
 

code/game/gamemodes/endgame/supermatter_cascade/universe.dm

@@ -84,7 +84,7 @@ The access requirements on the Asteroid Shuttles' consoles have now been revoked
 		return
 
 /datum/universal_state/supermatter_cascade/proc/AreaSet()
-	for(var/area/A in all_areas)
+	for(var/area/A in world)
 		if(!istype(A,/area) || istype(A, /area/space) || istype(A,/area/beach))
 			continue
 

code/game/gamemodes/events.dm

@@ -169,7 +169,7 @@ var/hadevent    = 0
 
 
 	var/list/area/areas = list()
-	for(var/area/A in all_areas)
+	for(var/area/A in world)
 		if(istype(A, /area/security/prison) || istype(A, /area/security/brig))
 			areas += A
 

code/game/machinery/turret_control.dm

@@ -51,7 +51,7 @@
 	else if(ispath(control_area))
 		control_area = locate(control_area)
 	else if(istext(control_area))
-		for(var/area/A in all_areas)
+		for(var/area/A in world)
 			if(A.name && A.name==control_area)
 				control_area = A
 				break