CI: remove pre tag

.gitlab-ci.yml

 include:
   - project: 'gnome/citemplates'
     file: 'flatpak/flatpak-ci-initiative-sdk-extensions.yml'
-    # ref: ''
 
 flatpak:
   image: 'registry.gitlab.gnome.org/gnome/gnome-runtime-images/rust_bundle:master'
@@ -21,7 +20,6 @@ nightly:
 # Exits and builds fails if on bad format
 rustfmt:
   image: "rust:slim"
-  stage: ".pre"
   script:
     - rustup component add rustfmt
     # Create blank versions of our configured files