Fix some harddels. (#21373)

Let's try to haunt down this brain and mannequin harddel bullshit

---------

Co-authored-by: Matt Atlas <liermattia@gmail.com>

code/modules/clothing/under/accessories/storage.dm

@@ -14,6 +14,10 @@
 	hold.max_storage_space = DEFAULT_BOX_STORAGE
 	hold.max_w_class = WEIGHT_CLASS_SMALL
 
+/obj/item/clothing/accessory/storage/Destroy()
+	QDEL_NULL(hold)
+	return ..()
+
 /obj/item/clothing/accessory/storage/attack_hand(mob/user as mob)
 	if (has_suit)	//if we are part of a suit
 		hold.open(user)

code/modules/events/carp_migration.dm

@@ -100,7 +100,8 @@
 		var/datum/weakref/carp_weakref = carp_ref
 		var/mob/living/simple_animal/hostile/carp/fish = carp_weakref.resolve()
 		if (fish && prob(50) && is_type_in_typecache(fish.loc, despawn_turfs))
-			qdel(fish)
+			spawned_carp -= carp_weakref
+			qdel(carp_weakref)
 
 /datum/event/carp_migration/cozmo/start()
 	..()

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

@@ -21,7 +21,7 @@
 			death(1)	//Brains can die again. AND THEY SHOULD AHA HA HA HA HA HA
 		ghostize()		//Ghostize checks for key so nothing else is necessary.
 	container = null
-	. = ..()
+	return ..()
 
 /mob/living/carbon/brain/IsAdvancedToolUser() // to be able to use weapons when piloting a hardsuit
 	return TRUE

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

@@ -19,7 +19,7 @@ INITIALIZE_IMMEDIATE(/mob/living/carbon/human/dummy/mannequin)
 
 /mob/living/carbon/human/dummy/mannequin/Destroy()
 	SSmobs.free_mannequin(src)
-	. = ..()
+	return ..()
 
 /mob/living/carbon/human/vatgrown/Initialize(mapload)
 	. = ..(mapload, SPECIES_HUMAN_VATGROWN)

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

@@ -66,9 +66,6 @@
 	var/toxloss = 0
 	var/datum/reagents/metabolism/ingested
 
-/mob/living/carbon/slime/get_ingested_reagents()
-	return ingested
-
 /mob/living/carbon/slime/Initialize(mapload, colour = "grey")
 	. = ..()
 
@@ -90,6 +87,19 @@
 	last_AI = world.time
 	regenerate_icons()
 
+/mob/living/carbon/slime/Destroy()
+	victim = null
+	target = null
+	leader = null
+	for(var/mob/friend in friends)
+		friends -= friend
+	friends.Cut()
+	QDEL_NULL(ingested)
+	return ..()
+
+/mob/living/carbon/slime/get_ingested_reagents()
+	return ingested
+
 /mob/living/carbon/slime/purple/Initialize(mapload, colour = "purple")
 	. = ..()
 

code/modules/overmap/exoplanets/exoplanet.dm

@@ -265,7 +265,6 @@
 					var/mob_type = pick(repopulate_types)
 					var/mob/S = new mob_type(T)
 					animals += S
-					GLOB.death_event.register(S, src, PROC_REF(remove_animal))
 					RegisterSignal(S, COMSIG_QDELETING, PROC_REF(remove_animal))
 					adapt_animal(S)
 			if(animals.len >= max_animal_count)
@@ -287,7 +286,6 @@
 
 /obj/effect/overmap/visitable/sector/exoplanet/proc/remove_animal(mob/M)
 	animals -= M
-	GLOB.death_event.unregister(M, src)
 	UnregisterSignal(M, COMSIG_QDELETING)
 	repopulate_types |= M.type
 

code/modules/reagents/reagent_containers/food/drinks/flask.dm

@@ -35,6 +35,10 @@
 	atom_flags ^= ATOM_FLAG_OPEN_CONTAINER
 	update_icon()
 
+/obj/item/reagent_containers/food/drinks/flask/vacuumflask/Destroy()
+	QDEL_NULL(cup)
+	return ..()
+
 /obj/item/reagent_containers/food/drinks/flask/vacuumflask/attack_self(mob/user)
 	if(cup)
 		to_chat(user, SPAN_NOTICE("You remove \the [src]'s cap."))