@Injo Ouch ! For me, you’ve found a little bug in Antergos, congrats :) .
Can confirm that freshly installed Antergos behaves as you describe. Continues to ask for password when it should not do that anymore.
I solved the issue here by removing the file
It contains (for my user):
just ALL=(ALL) ALL
These are sudo settings to ask for password when a command is prefixed with sudo.
The file’s content doesn’t change even if /etc/sudoers is edited with
Without /etc/sudoers.d/10-installer file, sudo visudo returns the expected results:
The native Arch Linux installations here don’t have the /etc/sudoers.d/10-installer file. The /etc/sudoers.d/ folder is empty.