Don't remove sssd domain if already removed
Don't remove sssd domain if already removed

If ipa-client-install or another process has removed the sssd
domain already, then skip the domain removal

Seen here: https://bugzilla.redhat.com/show_bug.cgi?id=961320

freedesktop-unofficial-mirror/realmd__realmd,freedesktop-unofficial-mirror/realmd__realmd,freedesktop-unofficial-mirror/realmd__realmd,freedesktop-unofficial-mirror/realmd__realmd