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/items/devices/radio/intercom.dm

@@ -28,24 +28,27 @@
 	icon_state = "intercom_prison"
 	icon_off = "intercom_prison-p"
 
-/obj/item/radio/intercom/prison/Initialize(mapload, ndir, building)
+/obj/item/radio/intercom/prison/Initialize(mapload)
 	. = ..()
 	wires?.cut(WIRE_TX)
 
-/obj/item/radio/intercom/Initialize(mapload, ndir, building)
+/obj/item/radio/intercom/Initialize(mapload)
 	. = ..()
 	var/area/current_area = get_area(src)
 	if(!current_area)
 		return
 	RegisterSignal(current_area, COMSIG_AREA_POWER_CHANGE, PROC_REF(AreaPowerCheck))
+	if(mapload)
+		find_and_hang_on_wall()
 	GLOB.intercoms_list += src
+
+/obj/item/radio/intercom/find_and_hang_on_wall()
 	if(!unscrewed)
-		find_and_hang_on_wall(directional = TRUE, \
-			custom_drop_callback = CALLBACK(src, PROC_REF(knock_down)))
+		return ..()
 
 /obj/item/radio/intercom/Destroy()
-	. = ..()
 	GLOB.intercoms_list -= src
+	return ..()
 
 /obj/item/radio/intercom/examine(mob/user)
 	. = ..()
@@ -87,7 +90,7 @@
 	if(tool.use_tool(src, user, 80))
 		user.visible_message(span_notice("[user] unsecures [src]!"), span_notice("You detach [src] from the wall."))
 		playsound(src, 'sound/items/deconstruct.ogg', 50, TRUE)
-		knock_down()
+		deconstruct(TRUE)
 
 /**
  * Override attack_tk_grab instead of attack_tk because we actually want attack_tk's
@@ -187,9 +190,8 @@
 /**
  * Called by the wall mount component and reused during the tool deconstruction proc.
  */
-/obj/item/radio/intercom/proc/knock_down()
+/obj/item/radio/intercom/atom_deconstruct(disassembled)
 	new/obj/item/wallframe/intercom(get_turf(src))
-	qdel(src)
 
 //Created through the autolathe or through deconstructing intercoms. Can be applied to wall to make a new intercom on it!
 /obj/item/wallframe/intercom
@@ -209,7 +211,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/item/radio/intercom, 27)
 	anonymize = TRUE
 	freqlock = RADIO_FREQENCY_EMAGGABLE_LOCK
 
-/obj/item/radio/intercom/chapel/Initialize(mapload, ndir, building)
+/obj/item/radio/intercom/chapel/Initialize(mapload)
 	. = ..()
 	set_frequency(1481)
 	set_broadcasting(TRUE)

code/game/objects/items/wall_mounted.dm

@@ -40,7 +40,7 @@
 			span_hear("You hear clicking."))
 		var/floor_to_wall = get_dir(user, on_wall)
 
-		var/obj/hanging_object = new result_path(get_turf(user), floor_to_wall, TRUE)
+		var/obj/hanging_object = new result_path(get_turf(user))
 		hanging_object.setDir(floor_to_wall)
 		if(pixel_shift)
 			switch(floor_to_wall)
@@ -52,6 +52,7 @@
 					hanging_object.pixel_x = pixel_shift
 				if(WEST)
 					hanging_object.pixel_x = -pixel_shift
+		hanging_object.find_and_hang_on_wall()
 		after_attach(hanging_object)
 
 	qdel(src)