fix (depuley_smart_ceiling_fan): hide null mapping

custom_components/tuya_local/devices/depuley_smart_ceiling_fan.yaml

@@ -97,6 +97,7 @@ entities:
         mapping:
           - dps_val: null
             value: false
+            hidden: true
       - id: 24
         name: std_rgbhsv
         type: string