stops free circut board from drying rack (#2983)

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## About The Pull Request

crowbar drying rack, get all wood back plus a smart fridge board.

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## Changelog

:cl:
fix: fixed free smart fridge circuit board from drying rack
/:cl:

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---------

Signed-off-by: FalloutFalcon <[email protected]>

code/modules/food_and_drinks/kitchen_machinery/smartfridge.dm

@@ -245,6 +245,7 @@
 	icon = 'icons/obj/hydroponics/equipment.dmi'
 	icon_state = "drying_rack"
 	use_power = IDLE_POWER_USE
+	circuit = null
 	idle_power_usage = IDLE_DRAW_MINIMAL
 	active_power_usage = ACTIVE_DRAW_MINIMAL
 	visible_contents = FALSE
@@ -258,7 +259,6 @@
 
 /obj/machinery/smartfridge/drying_rack/on_deconstruction()
 	new /obj/item/stack/sheet/mineral/wood(drop_location(), 10)
-	..()
 
 /obj/machinery/smartfridge/drying_rack/RefreshParts()
 /obj/machinery/smartfridge/drying_rack/default_deconstruction_screwdriver()