chore: remove one-time html repair workflow

.github/workflows/fix-index-html-once.yml

@@ -1,35 +0,0 @@
-name: Caterium One-Time HTML Repair
-on:
-  push:
-    branches: ["fix/html-integrity-v1774"]
-permissions:
-  contents: write
-concurrency:
-  group: caterium-html-repair-v1774
-  cancel-in-progress: false
-jobs:
-  repair:
-    if: ${{ !contains(github.event.head_commit.message, '[html-repair]') }}
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          ref: fix/html-integrity-v1774
-          fetch-depth: 0
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 22
-      - run: node scripts/fix-index-html-once.mjs
-      - name: Commit repaired index
-        shell: bash
-        run: |
-          set -euo pipefail
-          if git diff --quiet -- public/index.html; then
-            echo "No index change required"
-            exit 0
-          fi
-          git config user.name "github-actions[bot]"
-          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-          git add public/index.html
-          git commit -m "fix: close mobile style block [html-repair]"
-          git push origin HEAD:fix/html-integrity-v1774