fix (haozee_cogasleak_detector): remove diagnostics from CO reading

This is a primary function of the device, so should not be marked as diagnostic

Issue #3903

custom_components/tuya_local/devices/haozee_cogasleak_detector.yaml

@@ -112,7 +112,6 @@ entities:
           - value: false
   - entity: sensor
     class: carbon_monoxide
-    category: diagnostic
     dps:
       - id: 35
         type: integer