build: move deploy-v2-site to 2.x branch (#8752)

.github/workflows/deploy-v2-site.yml

@@ -1,29 +0,0 @@
-name: Deploy V2 Site
-
-on:
-  push:
-    branches: [2.x]
-    paths:
-      - 'docs/**'
-
-jobs:
-  build-and-deploy:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout 🛎️
-        uses: actions/checkout@v2
-        with:
-          ref: '2.x'
-
-      - name: Install dependencies
-        uses: bahmutov/npm-install@v1
-
-      - name: Build Site
-        run: npx --no-install vant-cli build-site
-
-      - name: Deploy 🚀
-        uses: JamesIves/github-pages-deploy-action@4.1.1
-        with:
-          branch: gh-pages
-          folder: site
-          clean: false