chore: remove PreRender and useLoader (#7499)

Author: yimingjfe

packages/document/main-doc/docs/en/apis/app/runtime/core/use-loader.mdx

@@ -17,11 +17,7 @@ Modern.js also retains SSR logs from legacy versions using `useLoader`:
 | Stage         | Message                         | Level |
 | ------------- | ------------------------------- | ----- |
 | PRERENDER     | App Prerender                   | error |
-| USE_LOADER    | App run useLoader               | error |
 
-:::tip
-The `useLoader` API is now deprecated. We recommend migrating to convention-based routing and using Data Loaders for data fetching. Applications already using Data Loaders can enable [`ssr.disablePrerender`](/configure/app/server/ssr.html#object-type) to disable prerendering and improve SSR performance.
-:::
 
 ## Built-in Monitor
 

packages/document/main-doc/docs/en/apis/app/runtime/ssr/pre-render.mdx

@@ -17,11 +17,7 @@ Modern.js 也保留了旧版本中使用 `useLoader` 获取数据时的 SSR 日
 | 阶段          | 消息                                         | Level |
 | ------------- | -------------------------------------------- | ----- |
 | PRERENDER   | App Prerender                          | error |
-| USE_LOADER | App run useLoader         | error |
 
-:::tip
-`useLoader` API 目前已经废弃，建议迁移到约定式路由并使用 Data Loader 进行数据获取。已经使用 Data Loader 的应用，可以开启 [`ssr.disablePrerender`](/configure/app/server/ssr.html#object-类型)，禁止预渲染，提升 SSR 性能。
-:::
 
 ## 内置 Monitor