Minor refactors (#26305)

obj/on_log changed to atom/on_log. Boolean parameter in
No admin irc message now checked in client/Del instead of mob/Logout
Removed an empty New()
1 -> TRUE
removed a potential crash in mob/Login

code/game/objects/structures/morgue.dm

@@ -24,9 +24,6 @@
 	var/locked = 0
 	var/opendir = SOUTH
 
-/obj/structure/bodycontainer/New()
-	..()
-
 /obj/structure/bodycontainer/Destroy()
 	open()
 	if(connected)
@@ -34,7 +31,8 @@
 		connected = null
 	return ..()
 
-/obj/structure/bodycontainer/on_log()
+/obj/structure/bodycontainer/on_log(login)
+	..()
 	update_icon()
 
 /obj/structure/bodycontainer/update_icon()