Upstream deprecated it and plan to drop it in the future.
Let's get ahead and drop it now as this feature is unlikely to be used on SUSE
distros and it might be used to gain access to encrypted SLEM systems with
unattended disk unlock and with secure boot disabled.
OBS-URL: https://build.opensuse.org/package/show/Base:System/systemd?expand=0&rev=1508
