Remove one-time v17.6.5 patch workflow

.github/workflows/patch-v1765-stability.yml

@@ -1,34 +0,0 @@
-name: Apply Caterium v17.6.5 stability patch
-
-on:
-  push:
-    branches:
-      - feature/v17.6.5-stability
-    paths:
-      - .github/workflows/patch-v1765-stability.yml
-
-permissions:
-  contents: write
-
-jobs:
-  patch:
-    if: github.actor != 'github-actions[bot]'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 22
-      - name: Apply stability hardening
-        run: |
-          node scripts/apply-v1765-stability.mjs
-          npm version 17.6.5 --no-git-tag-version --allow-same-version
-      - name: Validate patched syntax
-        run: npm run check:syntax
-      - name: Commit stability patch
-        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 tests docs
-          git commit -m "Harden Caterium v17.6.5 stability" || exit 0
-          git push