gnome-welcome-tour: Don't run the welcome tour

Don't run the welcome tour, as we don't install it because we don't have
a phone-focused version. This avoids showing Yelp empty to the users
after the initial setup.
2 jobs for librem5-3-32-1 in 0 seconds (queued for 112 minutes and 52 seconds)
Status Job ID Name Coverage
  Build
failed #152107
build-maximal

failed #152106
build-minimal

 
Name Stage Failure
failed
build-maximal Build There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job trace
failed
build-minimal Build There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job trace