keycloak: Remove obsolete configuration
account2 and account_api are enabled by default since keycloak 13 (https://www.keycloak.org/docs/13.0/server_installation/#profiles)
Due to an influx of spam, we have had to temporarily disable account registrations. Please write an email to accountsupport@archlinux.org, with your desired username, if you want to get access. Sorry for the inconvenience.
account2 and account_api are enabled by default since keycloak 13 (https://www.keycloak.org/docs/13.0/server_installation/#profiles)