Readd "remove machine-id" logic

Even though the system isn't booted, a machine-id is generated when
systemd is installed (by the .install script).

Fixes: 0b60f5a4 ("Remove "remove machine-id" logic")

Fix #117
3 jobs for remove-machine-id in 23 minutes and 40 seconds (queued for 1 second)
Status Name Job ID Coverage
  Lint
passed shellcheck #5821

00:00:20

passed shfmt #5822

00:00:16

 
  Build
passed build #5823

00:23:19