remove the sub-area system

Removes area/list/related and area/master.
They were only used by the old lighting subarea system.

Signed-off-by: Mloc <colmohici@gmail.com>

code/modules/power/apc.dm

@@ -1253,11 +1253,10 @@ obj/machinery/power/apc/proc/autoset(var/val, var/on)
 	if( cell && cell.charge>=20)
 		cell.use(20);
 		spawn(0)
-			for(var/area/A in area.related)
-				for(var/obj/machinery/light/L in A)
-					L.on = 1
-					L.broken()
-					sleep(1)
+			for(var/obj/machinery/light/L in area)
+				L.on = 1
+				L.broken()
+				sleep(1)
 
 /obj/machinery/power/apc/proc/setsubsystem(val)
 	if(cell && cell.charge > 0)

code/modules/power/gravitygenerator.dm

@@ -50,8 +50,8 @@
 	for(var/area/A in range(src,effectiverange))
 		if(A.name == "Space")
 			continue // No (de)gravitizing space.
-		if(A.master && !( A.master in localareas) )
-			localareas += A.master
+		if(!(A in localareas))
+			localareas += A
 
 /obj/machinery/computer/gravity_control_computer/proc/findgenerator()
 	var/obj/machinery/gravity_generator/foundgenerator = null
@@ -125,7 +125,7 @@
 			for(var/area/A in gravity_generator:localareas)
 				var/obj/machinery/gravity_generator/G
 				for(G in machines)
-					if((A.master in G.localareas) && (G.on))
+					if((A in G.localareas) && (G.on))
 						break
 				if(!G)
 					A.gravitychange(0,A)
@@ -137,4 +137,4 @@
 				A.gravitychange(1,A)
 
 		src.updateUsrDialog()
-		return
+		return

code/modules/power/lighting.dm

@@ -441,7 +441,7 @@
 // true if area has power and lightswitch is on
 /obj/machinery/light/proc/has_power()
 	var/area/A = src.loc.loc
-	return A.master.lightswitch && A.master.power_light
+	return A.lightswitch && A.power_light
 
 /obj/machinery/light/proc/flicker(var/amount = rand(10, 20))
 	if(flickering) return
@@ -613,7 +613,6 @@
 /obj/machinery/light/power_change()
 	spawn(10)
 		var/area/A = src.loc.loc
-		A = A.master
 		seton(A.lightswitch && A.power_light)
 
 // called when on fire

code/modules/power/power.dm

@@ -69,20 +69,20 @@
 	//	return 1
 
 	var/area/A = src.loc.loc		// make sure it's in an area
-	if(!A || !isarea(A) || !A.master)
+	if(!A || !isarea(A))
 		return 0					// if not, then not powered
 	if(chan == -1)
 		chan = power_channel
-	return A.master.powered(chan)	// return power status of the area
+	return A.powered(chan)			// return power status of the area
 
 // increment the power usage stats for an area
 /obj/machinery/proc/use_power(var/amount, var/chan = -1) // defaults to power_channel
 	var/area/A = get_area(src)		// make sure it's in an area
-	if(!A || !isarea(A) || !A.master)
+	if(!A || !isarea(A))
 		return
 	if(chan == -1)
 		chan = power_channel
-	A.master.use_power(amount, chan)
+	A.use_power(amount, chan)
 
 /obj/machinery/proc/power_change()		// called whenever the power settings of the containing area change
 										// by default, check equipment channel & set flag

code/modules/power/powernet.dm

@@ -150,7 +150,6 @@
 	return null
 
 /area/proc/get_apc()
-	for(var/area/RA in src.related)
-		var/obj/machinery/power/apc/FINDME = locate() in RA
-		if (FINDME)
-			return FINDME
+	var/obj/machinery/power/apc/FINDME = locate() in src
+	if (FINDME)
+		return FINDME