ci: remove deprecated jobs

The functionality of these jobs exists in the normal
build job now and they are no longer needed.

citemplates@544836ee
2 jobs for master in 10 minutes and 54 seconds
Status Job ID Name Coverage
  Flatpak
passed #837762
flatpak
flatpak:master

00:09:43

 
  Deploy
passed #837763
flatpak:nightly

00:01:10