refactor(nuxt)!: remove support for 404.vue shorthand (#8809)

packages/nuxt/src/pages/runtime/router.ts

@@ -177,8 +177,6 @@ export default defineNuxtPlugin(async (nuxtApp) => {
         fatal: false,
         statusMessage: `Page not found: ${to.fullPath}`
       })])
-    } else if (process.server && to.matched[0].name === '404' && nuxtApp.ssrContext) {
-      nuxtApp.ssrContext.event.res.statusCode = 404
     } else if (process.server) {
       const currentURL = to.fullPath || '/'
       if (!isEqual(currentURL, initialURL)) {

packages/nuxt/src/pages/utils.ts

@@ -68,7 +68,6 @@ export function generateRoutesFromFiles (files: string[], pagesDir: string): Nux
 
       const tokens = parseSegment(segment)
       const segmentName = tokens.map(({ value }) => value).join('')
-      const isSingleSegment = segments.length === 1
 
       // ex: parent/[slug].vue -> parent-slug
       route.name += (route.name && '-') + segmentName
@@ -79,8 +78,6 @@ export function generateRoutesFromFiles (files: string[], pagesDir: string): Nux
       if (child && child.children) {
         parent = child.children
         route.path = ''
-      } else if (segmentName === '404' && isSingleSegment) {
-        route.path += '/:catchAll(.*)*'
       } else if (segmentName === 'index' && !route.path) {
         route.path += '/'
       } else if (segmentName !== 'index') {

packages/nuxt/test/pages.test.ts

@@ -5,18 +5,6 @@ import { generateRouteKey } from '../src/pages/runtime/utils'
 describe('pages:generateRoutesFromFiles', () => {
   const pagesDir = 'pages'
   const tests = [
-    {
-      description: 'should generate correct route for 404',
-      files: [`${pagesDir}/404.vue`],
-      output: [
-        {
-          name: '404',
-          path: '/:catchAll(.*)*',
-          file: `${pagesDir}/404.vue`,
-          children: []
-        }
-      ]
-    },
     {
       description: 'should generate correct routes for index pages',
       files: [