Inkbird thermometer: remove diagnostic category from temp probe 4

Issue #548

custom_components/tuya_local/devices/inkbird_ibbq4bw_thermometer.yaml

@@ -49,7 +49,6 @@ secondary_entities:
   - entity: sensor
     name: Temperature probe 4
     class: temperature
-    category: diagnostic
     dps:
       - id: 110
         type: integer