Fix Some More Mob Deletions (#22588)

Fixes a few cases I missed of references that should have been nulled
instead of deleted.

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

@@ -96,7 +96,7 @@
 		set_default_attack(species.unarmed_attacks[1])
 
 /mob/living/carbon/human/Destroy(force)
-	QDEL_NULL(ghost_spawner)
+	ghost_spawner = null
 
 	//Srom (Shared Dreaming)
 	srom_pulled_by = null

code/modules/mob/living/living.dm

@@ -929,7 +929,7 @@ default behaviour is:
 	QDEL_LIST(auras)
 	QDEL_NULL(psi)
 	QDEL_NULL(aiming)
-	QDEL_LIST(aimed_at_by)
+	aimed_at_by?.Cut()
 	//Remove contained mobs
 	if(loc)
 		for(var/mob/M in contents)
@@ -942,7 +942,7 @@ default behaviour is:
 	available_maneuvers?.Cut()
 	default_language = null
 	QDEL_NULL(z_eye)
-	QDEL_NULL(last_weather)
+	last_weather = null
 	return ..()
 
 /mob/living/proc/nervous_system_failure()

code/modules/mob/mob.dm

@@ -1,5 +1,9 @@
 /mob/Destroy()//This makes sure that mobs with clients/keys are not just deleted from the game.
 	MOB_STOP_THINKING(src)
+	pulling?.pulledby = null
+	pulling = null
+	pullin?.icon_state = "pull0"
+	pullin = null
 	// Delete and null the grab objects that are touching this mob.
 	QDEL_LIST(grabbed_by)
 	GLOB.mob_list -= src
@@ -52,12 +56,7 @@
 	QDEL_NULL(zone_sel)
 	machine = null
 
-	pulling?.pulledby = null
-	pulling = null
-	pullin?.icon_state = "pull0"
-	pullin = null
-
-	QDEL_LIST(client_colors)
+	client_colors = null
 	additional_vision_handlers?.Cut()
 	pinned?.Cut()
 	QDEL_LIST(embedded)
@@ -70,7 +69,7 @@
 	s_active = null
 	wear_mask = null
 	QDEL_NULL(dna)
-	QDEL_NULL(LAssailant)
+	LAssailant = null
 	spell_list?.Cut()
 	lastarea = null
 	control_object = null
@@ -113,7 +112,7 @@
 	QDEL_NULL(narsimage)
 	QDEL_NULL(narglow)
 	QDEL_NULL(riftimage)
-	QDEL_NULL(bloody_hands_mob)
+	bloody_hands_mob = null
 	QDEL_NULL(eyeobj)
 	QDEL_NULL(bg)
 	my_client = null