Removed by upstream since commit:
bcbc410c92
This commit is included since v9 release:
https://github.com/yshui/picom/releases/tag/v9https://github.com/yshui/picom/releases/tag/v9-rc1 (the actual changelog)
While this doesn't break the config per see, it results in the
following warning in the logs:
[ DD/MM/YYYY HH:MM:SS.mmm parse_config_libconfig WARN ] The
refresh-rate option has been deprecated. Please remove it from
your configuration file. If you encounter any problems without
this feature, please feel free to open a bug report
Beside the above change we also remove an old workaround and also
write the configuration file to a well-known location in the user's
home directory.