chore: remove documentation deploy github action (#7766)

It is causing failed builds and we are not currently using it, plus we
want to move this setup into a new repository, such that it can run
independently of Puppeteer's main codebase.

For now, until that work is done, let's remove it to not cause build
issues and to not waste cycles on CI.

.github/workflows/deploy-docs.yml

@@ -1,29 +0,0 @@
-name: Build and deploy documentation
-on:
-  push:
-    branches:
-      - main
-
-jobs:
-  build-and-deploy:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Build
-        run: |
-          npm install
-          npm run generate-docs
-          npm run build-docs-production
-      - name: Set up SSH
-        uses: webfactory/ssh-agent@v0.4.1
-        with:
-          ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
-      - name: Deploy
-        uses: JamesIves/github-pages-deploy-action@releases/v3
-        with:
-          SSH: true
-          SINGLE_COMMIT: true
-          BASE_BRANCH: main
-          BRANCH: gh-pages
-          FOLDER: docs-dist