Remove class definition from Power level sensor

Removed 'class: power_factor' from the Power level sensor definition.

custom_components/tuya_local/devices/waterco_electroheat_eco-vs_heatpump.yaml

@@ -71,7 +71,6 @@ entities:
   - entity: sensor
     category: diagnostic
     name: Power level
-    class: power_factor
     dps:
       - id: 109
         type: integer