Ignore Xss idle monitor on wayland

Wayland doesn't provide XScreenSaver Extension.
3 jobs for idle in 4 minutes and 7 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Test
passed run-appdata #20297

00:00:11

passed run-tests #20296

00:03:42

 
  Build
passed run-build #20298

00:00:13