Dunking handle_atom_del() in the trash bin. (#77339)

Whatever you do, if it warrants the use of something like
`handle_atom_del`, chances are `Exited` can do it better, as most of
these cases involve movables that shouldn't be moved out of their loc
(`Destroy` forcefully moves movables to nullspace) without calling
specific procs, and for the remaining few, `handle_atom_del` doesn't
even cover the eventuality of a movable being deleted outside the source
atom, so it's quite garbage.

Beside, I feel confident in saying `handle_atom_del()` is older than the
DCS, an echo on the workarounds done at the time.

code/modules/detectivework/evidence.dm

@@ -19,7 +19,8 @@
 	if(evidencebagEquip(I, user))
 		return 1
 
-/obj/item/evidencebag/handle_atom_del(atom/A)
+/obj/item/evidencebag/Exited(atom/movable/gone, direction)
+	. = ..()
 	cut_overlays()
 	w_class = initial(w_class)
 	icon_state = initial(icon_state)