ci: remove GitHub Pages deployment

Cloudflare Pages is now the sole deployment target, with redirects
confirmed working. Remove the GitHub Pages deploy job and associated
pages artifact upload.

Author: jamestelfer

.github/workflows/deploy.yaml

@@ -1,15 +1,13 @@
-name: Deploy to GitHub Pages
+name: Deploy
 
 on:
   push:
     branches: [main]
   pull_request:
   workflow_dispatch:
 
-# Allow this job to clone the repo and create a page deployment
 permissions:
   contents: read
-  pages: write
   id-token: write
   deployments: write
   pull-requests: write
@@ -33,10 +31,6 @@ jobs:
         run: pnpm install
       - name: Build site
         run: pnpm run build
-      - name: Upload GitHub Pages artifact
-        uses: actions/upload-pages-artifact@v4
-        with:
-          path: dist/
       - name: Upload dist artifact
         uses: actions/upload-artifact@v7
         with:
@@ -99,14 +93,3 @@ jobs:
           PR_NUMBER: ${{ github.event.pull_request.number }}
         run: .github/scripts/cloudflare-deploy.sh comment
 
-  deploy:
-    needs: build
-    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-    runs-on: ubuntu-latest
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    steps:
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v5