General maintenance for wall mounts (#93534)

## About The Pull Request
- Fixes #93392
- Replaces all custom callbacks with call to `deconstruct()`. The
callbacks weren't necessary as it did the same thing as `deconstruct()`
but in an round about way
- Removed duplicate `Initialize()` procs and the params `building` &
`ndir` from all wall mounts. Makes everything cleaner

## Changelog
🆑
fix: wall mounts placed by player now falls off when the wall they are
mounted on is destroyed
code: cleaned up wall mount code
/🆑

code/game/objects/structures/secure_safe.dm

@@ -104,15 +104,16 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/secure_safe, 32)
 /obj/structure/secure_safe/Initialize(mapload)
 	. = ..()
 	//this will create the storage for us.
-	AddComponent(/datum/component/lockable_storage, stored_lock_code)
-
-	if(!density)
-		find_and_hang_on_wall()
+	AddComponent(/datum/component/lockable_storage, , stored_lock_code)
 	if(mapload)
 		PopulateContents()
-
+		find_and_hang_on_wall()
 	RegisterSignal(src, COMSIG_LOCKABLE_STORAGE_SET_CODE, PROC_REF(update_lock_code))
 
+/obj/structure/secure_safe/find_and_hang_on_wall()
+	if(!density)
+		return ..()
+
 /obj/structure/secure_safe/atom_deconstruct(disassembled)
 	if(!density) //if we're a wall item, we'll drop a wall frame.
 		var/obj/item/wallframe/secure_safe/new_safe = new(get_turf(src))