Set cool_heat attribute as hidden and remove its unnecessary mapping

custom_components/tuya_local/devices/polytherm_polyalpha_thermostat.yaml

@@ -62,11 +62,7 @@ entities:
       - id: 104
         type: boolean
         name: cool_heat
-        mapping:
-          - dps_val: false
-            value: cool
-          - dps_val: true
-            value: heat
+        hidden: true
   - entity: lock
     translation_key: child_lock
     category: config