Remove vercel adapter since not using any vercel specific things.

package.json

@@ -17,7 +17,6 @@
     "@playwright/test": "^1.23.2",
     "@rgossiaux/svelte-headlessui": "1.0.2",
     "@sveltejs/adapter-auto": "next",
-    "@sveltejs/adapter-vercel": "next",
     "@sveltejs/kit": "next",
     "@types/cookie": "^0.5.1",
     "@types/node": "^17.0.45",

svelte.config.js

@@ -1,4 +1,4 @@
-import vercel from '@sveltejs/adapter-vercel';
+import adapter from '@sveltejs/adapter-auto';
 import preprocess from 'svelte-preprocess';
 
 /** @type {import('@sveltejs/kit').Config} */
@@ -7,20 +7,7 @@ const config = {
   // for more information about preprocessors
   preprocess: preprocess(),
   kit: {
-    adapter: vercel({
-      // if true, will deploy the app using edge functions
-      // (https://vercel.com/docs/concepts/functions/edge-functions)
-      // rather than serverless functions
-      edge: false,
-
-      // an array of dependencies that esbuild should treat
-      // as external when bundling functions
-      external: [],
-
-      // if true, will split your app into multiple functions
-      // instead of creating a single one for the entire app
-      split: false
-    }),
+    adapter: adapter(),
     alias: {
       $components: 'src/components',
       $root: './src'