fix (loratap_zigbee_curtain): don't restrict position to steps of 10.

No other curtain has this restriction, and it isn't clear why this one would need it
If the steps are restricted, I'd expect the device to handle that internally anyway.

custom_components/tuya_local/devices/loratap_zigbee_curtain.yaml

@@ -26,8 +26,6 @@ entities:
         range:
           min: 0
           max: 100
-        mapping:
-          - step: 10
       - id: 14
         name: light_mode
         type: string