Unit conversion not working

[thecem]

unit conversion is not working:

https://developers.home-assistant.io/blog/2022/12/07/unit_system_changes?_highlight=unit

Existing integration specific code implementing unit conversion can, in most cases, be removed as the sensor's state will be automatically converted after the custom code is removed. For details on how this works, see core PR #83228. Note: This only works for sensors with a unique_id.