Revert "CI: add manual workflow to publish pages to fix submodule issue"

Nope, it's broken, never mind

This reverts commit b0f9c3c648.

.github/workflows/jekyll-gh-pages.yml

@@ -1,56 +0,0 @@
-# Sample workflow for building and deploying a Jekyll site to GitHub Pages
-name: Deploy Jekyll with GitHub Pages dependencies preinstalled
-
-on:
-  # Runs on pushes targeting the default branch
-  push:
-    branches: ["main", "v256-stable"]
-
-  # Allows you to run this workflow manually from the Actions tab
-  workflow_dispatch:
-
-# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
-permissions:
-  contents: read
-  pages: write
-  id-token: write
-
-# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
-# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
-concurrency:
-  group: "pages"
-  cancel-in-progress: false
-
-jobs:
-  # Build job
-  build:
-    if: github.repository == 'systemd/systemd' || github.repository == 'systemd/systemd-stable'
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-        with:
-          # We need a full repo clone or it will fail to clone the fedora/centos submodules
-          fetch-depth: 0
-      - name: Setup Pages
-        uses: actions/configure-pages@v5
-      - name: Build with Jekyll
-        uses: actions/jekyll-build-pages@v1
-        with:
-          source: ./
-          destination: ./_site
-      - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
-
-  # Deployment job
-  deploy:
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    if: github.repository == 'systemd/systemd' || github.repository == 'systemd/systemd-stable'
-    runs-on: ubuntu-latest
-    needs: build
-    steps:
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v4