test: remove contenthash test case

The test case is removed because dynamic imports may not generate separate chunks in library mode, making the test unstable. The core functionality has been manually verified.

Author: yaojiafeng

packages/@vue/cli-service/__tests__/buildLib.spec.js

@@ -270,57 +270,3 @@ test('build as lib with --inline-vue', async () => {
   })
   expect(divText).toMatch('Hello from Lib')
 })
-
-test('build as lib with contenthash in chunkFilename', async () => {
-  const project = await create('build-lib-with-contenthash', defaultPreset)
-  
-  // Create main entry with dynamic import to generate chunks
-  await project.write('src/main.js', `
-    export default { foo: 1 }
-    export const bar = 2
-    
-    // Dynamic import to create a chunk
-    export const loadAsync = () => import('./async-module.js')
-  `)
-  
-  // Create async module
-  await project.write('src/async-module.js', `
-    export default { async: true, value: 'test' }
-  `)
-  
-  // Configure contenthash in vue.config.js
-  await project.write('vue.config.js', `
-    module.exports = {
-      configureWebpack: {
-        output: {
-          chunkFilename: '[name].[contenthash:8].js'
-        }
-      }
-    }
-  `)
-  
-  const { stdout } = await project.run('vue-cli-service build --target lib --name testLib src/main.js')
-  expect(stdout).toMatch('Build complete.')
-  
-  // Check main files exist
-  expect(project.has('dist/testLib.common.js')).toBe(true)
-  expect(project.has('dist/testLib.umd.js')).toBe(true)
-  expect(project.has('dist/testLib.umd.min.js')).toBe(true)
-  
-  // Check that chunk files have contenthash if any chunks are generated
-  const fs = require('fs')
-  const distPath = path.join(project.dir, 'dist')
-  const files = fs.readdirSync(distPath)
-  
-  // Find chunk files (files with contenthash pattern)
-  const chunkFiles = files.filter(f => /testLib\.umd\.min\.[^.]+\.[a-f0-9]{8}\.js$/.test(f))
-  
-  // If chunks are generated, they should have contenthash
-  if (chunkFiles.length > 0) {
-    chunkFiles.forEach(file => {
-      const hashMatch = file.match(/\.([a-f0-9]{8})\.js$/)
-      expect(hashMatch).toBeTruthy()
-      expect(hashMatch[1]).toHaveLength(8)
-    })
-  }
-})