Removes 509 support.

code/controllers/subsystem.dm

@@ -25,9 +25,7 @@
 	var/last_fire = 0		//last world.time we called fire()
 	var/next_fire = 0		//scheduled world.time for next fire()
 	var/cost = 0			//average time to execute
-#if DM_VERSION >= 510
 	var/tick_usage = 0		//average tick usage
-#endif
 	var/paused =0			//was this subsystem paused mid fire.
 	var/times_fired = 0		//number of times we have called fire()
 
@@ -45,13 +43,11 @@
 	set waitfor = 0 //this should not be depended upon, this is just to solve issues with sleeps messing up tick tracking
 	can_fire = 0
 
-#if DM_VERSION >= 510
 /datum/subsystem/proc/pause()
 	. = 1
 	if (!dynamic_wait)
 		Master.priority_queue += src
 	paused = 1
-#endif
 
 //used to initialize the subsystem AFTER the map has loaded
 /datum/subsystem/proc/Initialize(start_timeofday, zlevel)
@@ -73,11 +69,7 @@
 		dwait = "DWait:[round(wait,0.1)]ds "
 
 	if(can_fire)
-#if DM_VERSION >= 510
 		msg = "[round(cost,0.01)]ds|[round(tick_usage,1)]%\t[dwait][msg]"
-#else
-		msg = "[round(cost,0.01)]ds\t[dwait][msg]"
-#endif
 	else
 		msg = "OFFLINE\t[msg]"