Delect stdf in demo

demo/package.json

@@ -13,7 +13,6 @@
         "@sveltejs/vite-plugin-svelte": "^2.0.2",
         "autoprefixer": "^10.4.13",
         "postcss": "^8.4.19",
-        "stdf": "^0.1.3",
         "svelte": "^3.55.1",
         "svelte-spa-router": "^3.3.0",
         "tailwindcss": "^3.2.4",