update zh-cn/device-dev/subsystems/subsys-boot.md.

Signed-off-by: NAustin23 <liaozhiqi7@huawei.com>

zh-cn/device-dev/subsystems/subsys-boot.md

@@ -5,7 +5,6 @@
 - **[启动恢复子系统概述](subsys-boot-overview.md)**
 - **[init启动引导组件](subsys-boot-init.md)**
 - **[appspawn应用孵化组件](subsys-boot-appspawn.md)**
-- **[appspawn标准系统应用孵化组件](subsys-boot-appspawn-standard.md)**  
 - **[bootstrap服务启动组件](subsys-boot-bootstrap.md)**
 - **[syspara系统属性组件](subsys-boot-syspara.md)**
 - **[常见问题](subsys-boot-faqs.md)**