feat: remove vercel

packages/website/package.json

@@ -36,7 +36,6 @@
     "@astrojs/check": "^0.9.3",
     "@astrojs/react": "^3.6.2",
     "@astrojs/sitemap": "^3.2.0",
-    "@astrojs/vercel": "^7.8.1",
     "@types/js-cookie": "^3.0.6",
     "@types/react": "^18.3.5",
     "@types/react-dom": "^18",