refactor: remove unused var /mob/var/LAssailant (#28825)

code/game/objects/items.dm

@@ -661,11 +661,6 @@ GLOBAL_DATUM_INIT(welding_sparks, /mutable_appearance, mutable_appearance('icons
 		to_chat(user, "<span class='warning'>You cannot locate any eyes on this creature!</span>")
 		return
 
-	if(!iscarbon(user))
-		M.LAssailant = null
-	else
-		M.LAssailant = user
-
 	src.add_fingerprint(user)
 
 	playsound(loc, src.hitsound, 30, TRUE, -1)

code/game/objects/items/weapons/batons.dm

@@ -97,7 +97,6 @@
 	playsound(target, stun_sound, 75, TRUE, -1)
 	add_attack_logs(user, target, "Knocked down with [src]")
 	// Hit 'em
-	target.LAssailant = iscarbon(user) ? user : null
 	target.KnockDown(knockdown_duration)
 	on_cooldown = TRUE
 	addtimer(VARSET_CALLBACK(src, on_cooldown, FALSE), cooldown)

code/game/objects/items/weapons/storage/bible.dm

@@ -73,10 +73,6 @@
 
 /obj/item/storage/bible/attack__legacy__attackchain(mob/living/M, mob/living/user)
 	add_attack_logs(user, M, "Hit with [src]")
-	if(!iscarbon(user))
-		M.LAssailant = null
-	else
-		M.LAssailant = user
 
 	if(!(ishuman(user) || SSticker) && SSticker.mode.name != "monkey")
 		to_chat(user, "<span class='warning'>You don't have the dexterity to do this!</span>")