ci: remove documentation deployment

.github/workflows/docs.yml

@@ -1,58 +0,0 @@
-name: Documentation
-
-on:
-  pull_request:
-    paths:
-      - "docs/**"
-      - ".github/workflows/docs.yml"
-  push:
-    branches: [main]
-    paths:
-      - "docs/**"
-      - ".github/workflows/docs.yml"
-  workflow_dispatch:
-
-permissions:
-  contents: read
-  pages: write
-  id-token: write
-
-concurrency:
-  group: "pages"
-  cancel-in-progress: false
-
-jobs:
-  build:
-    name: Build Markdown manual
-    runs-on: ubuntu-24.04
-    steps:
-      - name: Check out source
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-
-      - name: Configure GitHub Pages
-        uses: actions/configure-pages@v5
-
-      - name: Install mdBook
-        run: cargo install mdbook --version 0.5.3 --locked
-
-      - name: Build the site
-        run: mdbook build docs
-
-      - name: Upload Pages artifact
-        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-        uses: actions/upload-pages-artifact@v4
-        with:
-          path: target/docs
-
-  deploy:
-    name: Deploy documentation
-    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-    needs: build
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    runs-on: ubuntu-24.04
-    steps:
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v4

docs/src/getting-started.md

@@ -37,6 +37,4 @@ repository's Nix development shell provides the checked tool version:
 nix develop -c make -C docs build
 ```
 
-The generated static site is written to `target/docs/`. The GitHub Pages
+The generated static site is written to `target/docs/`.
-workflow builds that same output from `main`; enable **GitHub Actions** as the
-repository's Pages publishing source once, then deployments are automatic.