obsapisetup removes options from options.yml

In former times, obsapisetup was used to set `webui_url`, `webui_host`, `read_only_hosts` and `allow_anonymous`. This was removed with c44418b90d8e2d1395d88530cd4bd84c52a5c2ec, as the settings are now configured using `osc api /configuration`, but one line survived.