docs: updated info about 404.vue

docs/content/1.docs/2.guide/2.directory-structure/1.pages.md

@@ -150,10 +150,6 @@ Navigating to `/hello/world` would render:
 <p>["hello", "world"]</p>
 ```
 
-::alert{type="info"}
-Nuxt also supports a custom `pages/404.vue` file which will handle all routes that are not otherwise matched (and set a 404 error code).
-::
-
 ## Nested Routes
 
 It is possible to display [nested routes](https://next.router.vuejs.org/guide/essentials/nested-routes.html) with `<NuxtPage>`.