Removes duplicate first death log (#35832)

* Update blackbox.dm

* Update death.dm

* Update ticker.dm

code/controllers/subsystem/ticker.dm

@@ -32,8 +32,6 @@ SUBSYSTEM_DEF(ticker)
 	SCRIPTURE_SCRIPT = FALSE, \
 	SCRIPTURE_APPLICATION = FALSE) //list of clockcult scripture states for announcements
 
-	var/list/first_death = list()			//contains info about the first player to die; ckey, name, location, and last words
-
 	var/delay_end = 0						//if set true, the round will not restart on it's own
 	var/admin_delay_notice = ""				//a message to display to anyone who tries to restart the world after a delay
 	var/ready_for_reboot = FALSE			//all roundend preparation done with, all that's left is reboot