Fix flaky hard delete on hearts (#96797)

## About The Pull Request

#96409 correctly identified the source of the problem, but failed to
resolve it because the timer is actually added during qdel, as part of
Destroy related organ movement. That means it's already past the point
where a delete_me timer would get removed.

## Why It's Good For The Game

Fixes #96458

## Changelog

N/A

code/modules/surgery/organs/internal/heart/_heart.dm

@@ -47,7 +47,7 @@
 
 /obj/item/organ/heart/Remove(mob/living/carbon/heartless, special, movement_flags)
 	. = ..()
-	if(!special)
+	if(!special && !QDELETED(src))
 		addtimer(CALLBACK(src, PROC_REF(stop_if_unowned)), 12 SECONDS, TIMER_DELETE_ME)
 	beat = BEAT_NONE
 	owner?.stop_sound_channel(CHANNEL_HEARTBEAT)