update zh-cn/device-dev/subsystems/Readme-CN.md.

Signed-off-by: N zengyawen <zengyawen1@huawei.com>

update zh-cn/device-dev/subsystems/Readme-CN.md.
Signed-off-by: N zengyawen <zengyawen1@huawei.com>
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zh-cn/device-dev/subsystems/Readme-CN.md zh-cn/device-dev/subsystems/Readme-CN.md +0 -4

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    - [Sensor服务概述](subsys-sensor-overview.md)
    - [Sensor服务使用指导](subsys-sensor-guide.md)
    - [Sensor服务使用实例](subsys-sensor-demo.md)
- USB服务
-    - [USB服务概述](subsys-usbservice-overview.md)
-    - [USB服务使用指导](subsys-usbservice-guide.md)
-    - [USB服务使用实例](subsys-usbservice-demo.md)
 - 用户程序框架
    - [概述](subsys-application-framework-overview.md)
    - [搭建环境](subsys-application-framework-envbuild.md)