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

code/modules/mob/living/carbon/human/species/_species.dm

@@ -562,11 +562,6 @@
 		return FALSE
 	add_attack_logs(user, target, "Melee attacked with fists", target.ckey ? null : ATKLOG_ALL)
 
-	if(!iscarbon(user))
-		target.LAssailant = null
-	else
-		target.LAssailant = user
-
 	target.lastattacker = user.real_name
 	target.lastattackerckey = user.ckey
 

code/modules/mob/living/living.dm

@@ -1008,12 +1008,6 @@
 	AM.pulledby = src
 	if(pullin)
 		pullin.update_icon(UPDATE_ICON_STATE)
-	if(ismob(AM))
-		var/mob/M = AM
-		if(!iscarbon(src))
-			M.LAssailant = null
-		else
-			M.LAssailant = usr
 
 /mob/living/proc/check_pull()
 	if(pulling && !pulling.Adjacent(src))

code/modules/mob/living/living_defense.dm

@@ -305,7 +305,6 @@
 		return 0
 	user.put_in_active_hand(G)
 	G.synch()
-	LAssailant = user
 
 	playsound(src.loc, 'sound/weapons/thudswoosh.ogg', 50, TRUE, -1)
 	/*if(user.dir == src.dir)

code/modules/mob/mob.dm

@@ -25,7 +25,6 @@
 		for(var/datum/alternate_appearance/AA in viewing_alternate_appearances)
 			AA.viewers -= src
 		viewing_alternate_appearances = null
-	LAssailant = null
 	runechat_msg_location = null
 	if(length(observers))
 		for(var/mob/dead/observe as anything in observers)

code/modules/mob/mob_grab.dm

@@ -343,10 +343,6 @@
 		icon_state = "grabbed+1"
 
 		add_attack_logs(assailant, affecting, "Neck grabbed", ATKLOG_ALL)
-		if(!iscarbon(assailant))
-			affecting.LAssailant = null
-		else
-			affecting.LAssailant = assailant
 		hud.icon_state = "kill"
 		hud.name = "kill"
 		affecting.Stun(3 SECONDS) // Ensures the grab is able to be secured

code/modules/mob/mob_vars.dm

@@ -138,9 +138,6 @@
 //Generic list for proc holders. Only way I can see to enable certain verbs/procs. Should be modified if needed.
 	var/proc_holder_list[] = list()
 
-//The last mob/living/carbon to push/drag/grab this mob (mostly used by slimes friend recognition)
-	var/mob/living/carbon/LAssailant = null
-
 	var/list/mob_spell_list = list() //construct spells and mime spells. Spells that do not transfer from one mob to another and can not be lost in mindswap.
 
 //List of active diseases