CI: drop superfluous overrides

They are provided by the template we inherit from.

.gitlab-ci.yml

@@ -50,24 +50,21 @@ stages:
         expire_in: 2 days
 
 flatpak devel:
+    extends: '.flatpak'
     image: registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:3.34
-    stage: test
     variables:
         MANIFEST_PATH: "build-aux/flatpak/org.gnome.Nautilus.yml"
         MESON_ARGS: "-Dprofile=Devel -Dtests=all"
         FLATPAK_MODULE: "nautilus"
         RUNTIME_REPO: "https://sdk.gnome.org/gnome.flatpakrepo"
         APP_ID: "org.gnome.NautilusDevel"
-    extends: '.flatpak'
 
 review:
-    stage: deploy
     dependencies:
         - 'flatpak devel'
     extends: '.review'
 
 stop_review:
-    stage: deploy
     extends: '.stop_review'
 
 fedora rawhide: