Updates subsystem definitions to new standards. (#17470)

* My heart is dragging me down into...

...oblivion!

* drifting closer to the edge but she won't have me

* ever round me we are dead before we meet her

* for the last time

* wake up in sweat

* n

* fff

* uff

---------

Co-authored-by: Matt Atlas <liermattia@gmail.com>

code/controllers/subsystems/fail2topic.dm

@@ -1,6 +1,4 @@
-var/datum/controller/subsystem/fail2topic/SSfail2topic
-
-/datum/controller/subsystem/fail2topic
+SUBSYSTEM_DEF(fail2topic)
 	name = "Fail2Topic"
 	init_order = SS_INIT_MISC_FIRST
 	flags = SS_BACKGROUND
@@ -14,9 +12,6 @@ var/datum/controller/subsystem/fail2topic/SSfail2topic
 	var/max_fails
 	var/enabled = FALSE
 
-/datum/controller/subsystem/fail2topic/New()
-	NEW_SS_GLOBAL(SSfail2topic)
-
 /datum/controller/subsystem/fail2topic/Initialize(timeofday)
 	rate_limit = config.fail2topic_rate_limit
 	max_fails = config.fail2topic_max_fails