Consolidates some /Destroy()s to make them properly delete (#17046)

* The mob/living/Destroy() consolidation

* The mob/Destroy() consolidation

* The /mob/living/carbon/human consolidation

* The datum/Destroy() Consolidation

* The /atom/movable/Destroy() Consolidation

* for human

code/modules/ai/ai_holder.dm

@@ -19,16 +19,6 @@
 		initialize_ai_holder()
 	return ..()
 
-/mob/living/Destroy()
-	if(ai_holder)
-		ai_holder.holder = null
-		ai_holder.UnregisterSignal(src,COMSIG_MOB_STATCHANGE)
-		if(ai_holder.faction_friends && ai_holder.faction_friends.len) //This list is shared amongst the faction
-			ai_holder.faction_friends -= src
-			ai_holder.faction_friends = null
-		QDEL_NULL(ai_holder)
-	return ..()
-
 /mob/living/Login()
 	if(!stat && ai_holder)
 		ai_holder.manage_processing(AI_NO_PROCESS)

code/modules/ai/say_list.dm

@@ -14,11 +14,6 @@
 		say_list = new say_list_type(src)
 	return ..()
 
-/mob/living/Destroy()
-	QDEL_NULL(say_list)
-	return ..()
-
-
 /datum/say_list
 	var/list/speak = list()				// Things the mob might say if it talks while idle.
 	var/list/emote_hear = list()		// Hearable emotes it might perform