I ask because I see a new version of /etc/pacman.conf which has the antergos repository removed from it. Should I start to use this updated configuration?
Is the Antergos repository still needed?
Nope, something must be wrong.
I put it here the Antergos repo so you can add it to your pacman.conf file:
[antergos] SigLevel = PackageRequired Include = /etc/pacman.d/antergos-mirrorlist