workflow: gh-pages is no longer deployed

.github/workflows/preview.yml

@@ -1,34 +0,0 @@
-name: preview
-
-on:
-  push:
-    branches:
-      - master
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        node-version: [12.x]
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v1
-
-      - name: Setup node
-        uses: actions/setup-node@v2
-        with:
-          node-version: "16"
-          registry-url: https://registry.npmjs.com/
-
-      - name: Setup pnpm
-        uses: pnpm/action-setup@v2
-        with:
-          version: latest
-
-      - name: run deploy.sh
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: pnpm install && pnpm deploy