CI: Remove pages pipeline

This has been failing since February 2020, and is
not needed now that we don't roll our own API crate
anymore.

.gitlab-ci.yml

@@ -43,23 +43,3 @@ nightly:
   extends: '.publish_nightly'
   dependencies: ['flatpak']
   needs: ['flatpak']
-
-pages:
-    image: "$FLATPAK_IMAGE"
-    stage: deploy
-    tags:
-        - flatpak
-    script:
-        - flatpak-builder --user --disable-rofiles-fuse --stop-at=${FLATPAK_MODULE} --force-clean app ${MANIFEST_PATH}
-        - flatpak-builder --user --disable-rofiles-fuse --run app ${MANIFEST_PATH} meson _build
-
-        - flatpak-builder --user --disable-rofiles-fuse --run app ${MANIFEST_PATH} ninja -C _build doc
-
-        - rm -rf public
-        - mv _build/target/doc/ public
-    artifacts:
-        paths:
-          - public
-    only:
-        - master
-    <<: *flatpak_cache