Remove one-time v17.6.7 patch workflow

.github/workflows/patch-v1767-classic-offer.yml

@@ -1,34 +0,0 @@
-name: Patch v17.6.7 classic client PDF
-
-on:
-  push:
-    branches:
-      - feature/v17.6.7-classic-offer-pdf
-    paths:
-      - .github/workflows/patch-v1767-classic-offer.yml
-
-permissions:
-  contents: write
-
-jobs:
-  patch:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 22
-      - name: Apply patch
-        run: |
-          node .github/scripts/patch-v1767-classic-offer.mjs
-          node --check public/core/classic-offer-pdf-v1767.js
-          node --check public/app-runtime.js
-          node --check public/core/ux-fixes-v1764.js
-          node --check public/core/performance.js
-      - name: Commit
-        run: |
-          git config user.name "github-actions[bot]"
-          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-          git add public package.json package-lock.json docs tests
-          git commit -m "Restore classic client proposal PDF templates" || exit 0
-          git push