projects/WeTek_*: Cleanup settings in default advancedsettings.xml that have been removed in Kodi Krypton
* projects/WeTek_Hub: Cleanup settings in default advancedsettings.xml that have been removed in Kodi Krypton
* projects/WeTek_Hub: Remove readbufferfactor from advancedsettings.xml, because readbufferfactor is anyway 4.0 by default
* projects/WeTek_Hub: Remove loglevel of 2 from advancedsettings.xml, we don't need debug logging by default
* projects/WeTek_Core: Cleanup settings in default advancedsettings.xml that have been removed in Kodi Krypton