♻️ Remove unused lib (#2191)

Author: KATO-Hiro

package.json

@@ -34,7 +34,6 @@
     "@eslint/js": "9.29.0",
     "@playwright/test": "1.53.0",
     "@quramy/prisma-fabbrica": "2.3.0",
-    "@sveltejs/adapter-auto": "6.0.1",
     "@sveltejs/adapter-vercel": "5.7.2",
     "@sveltejs/kit": "2.21.5",
     "@sveltejs/vite-plugin-svelte": "5.1.0",