unl0kr: dont run atop getty -- just a bare /dev/tty1

i'm not sure what agetty was ever doing here.
unl0kr itself runs fine, it launches ~/.profile, and if i interrupt ~/.profile to use a console, that works too.

the console does regularly get interrupted by systemd output,
but i've checked and the agetty method had that same program.

hosts/common/programs/unl0kr/default.nix

@@ -134,16 +134,14 @@ in
     # prevent nixos-rebuild from killing us after a redeploy
     services."autovt@${tty}".enable = false;
     services.unl0kr = {
-      # --skip-login is funny here: it *doesn't* skip the login; rather it has getty not try to read the username for itself
-      #   and instead launch --login-program *immediately*
-      # N.B.: exec paths here must be absolute. neither systemd nor agetty query PATH.
-      serviceConfig.ExecStart = "${pkgs.util-linux}/bin/agetty --login-program '${cfg.config.launcher}/bin/unl0kr-login' --noclear --skip-login --keep-baud ${tty} 115200,38400,9600 $TERM";
+      serviceConfig.ExecStart = "${cfg.config.launcher}/bin/unl0kr-login";
 
       serviceConfig.Type = "simple";
       serviceConfig.Restart = "always";
       serviceConfig.RestartSec = "5";
       # XXX: unsure which of these are necessary nor what they do.
       # copied from greetd and agetty services.
+      # serviceConfig.{TTYPath,StandardInput,StandardOutput} connects the corresponding tty to the service's stdin/stdout.
       serviceConfig.TTYPath = "/dev/${tty}";
       serviceConfig.TTYReset = "yes";
       serviceConfig.StandardInput = "tty";