refactor(editor): remove default entry (#9600)

blocksuite/playground/vite.config.ts

@@ -213,7 +213,6 @@ export default defineConfig(({ mode }) => {
         },
         input: {
           main: resolve(__dirname, 'index.html'),
-          'starter/': resolve(__dirname, 'starter/index.html'),
           'examples/basic/page': resolve(
             __dirname,
             'examples/basic/page/index.html'