[MIRROR] null keys on observer destroy (#11862)

Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>

code/modules/mob/dead/observer/observer.dm

@@ -557,9 +557,9 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 	//ChompEDIT START - deal with weird behavior on qdelled ghosts
 	if(client) //qdelling a ghost with a client = make a new ghost i guess
 		ghostize()
-	if(key) //qdelling a ghost with a key = remove the key first to prevent logging into the GC queue
-		key = null
 	//ChompEDIT END
+	if(key)
+		key = null
 	return ..()
 
 /mob/Moved(atom/old_loc, direction, forced = FALSE)