Electriq CD12Pro: fix class usage

class does not apply to dps on main entity, remove it.
Apply problem class to tank binary sensor.

custom_components/tuya_local/devices/electriq_cd12pro_dehumidifier.yaml

@@ -16,7 +16,6 @@ primary_entity:
     - id: 2
       type: integer
       name: humidity
-      class: humidity
       range:
         min: 35
         max: 80
@@ -131,6 +130,7 @@ secondary_entities:
             icon: "mdi:sleep-off"
   - entity: binary_sensor
     name: Tank
+    class: problem
     category: diagnostic
     dps:
       - id: 19