chore: remove second twoslash prop too 🤔

docs/1.getting-started/9.layers.md

@@ -19,7 +19,7 @@ One of the core features of Nuxt 3 is the layers and extending support. You can
 
 You can extend a layer by adding the [extends](/docs/api/nuxt-config#extends) property to the [`nuxt.config.ts`](/docs/guide/directory-structure/nuxt-config) file.
 
-```ts twoslash [nuxt.config.ts]
+```ts [nuxt.config.ts]
 export default defineNuxtConfig({
   extends: [
     '../base',                     // Extend from a local layer