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/alarm/alarm.dm

@@ -96,18 +96,17 @@
 * Assisting procs *
 ******************/
 /atom/proc/get_alarm_area()
-	var/area/A = get_area(src)
-	return A.master
+	return get_area(src)
 
 /area/get_alarm_area()
-	return src.master
+	return src
 
 /atom/proc/get_alarm_name()
 	var/area/A = get_area(src)
-	return A.master.name
+	return A.name
 
 /area/get_alarm_name()
-	return master.name
+	return name
 
 /mob/get_alarm_name()
 	return name

code/modules/alarm/alarm_handler.dm

@@ -84,8 +84,7 @@
 	return src
 
 /turf/get_alarm_origin()
-	var/area/area = get_area(src)
-	return area.master	// Very important to get area.master, as dynamic lightning can and will split areas.
+	return get_area(src)
 
 /datum/alarm_handler/proc/register(var/object, var/procName)
 	listeners[object] = procName