在目录中删除不需要体现的单板链接

Signed-off-by: Nli-yan339 <liyan339@h-partners.com>

zh-cn/device-dev/quick-start/Readme-CN.md

@@ -61,11 +61,6 @@
             - [编译](quickstart-ide-standard-running-hi3516-build.md)
             - [烧录](quickstart-ide-standard-running-hi3516-burning.md)
             - [运行](quickstart-ide-standard-running-hi3516-running.md)
-        - Hi3751开发板
-            - [编写“Hello World”程序](quickstart-ide-standard-running-hi3751-create.md)
-            - [编译](quickstart-ide-standard-running-hi3751-build.md)
-            - [烧录](quickstart-ide-standard-running-hi3751-burning.md)
-            - [运行](quickstart-ide-standard-running-hi3751-running.md)
         - RK3568开发板
             - [编写“Hello World”程序](quickstart-ide-standard-running-rk3568-create.md)
             - [编译](quickstart-ide-standard-running-rk3568-build.md)
@@ -74,7 +69,6 @@
     - 附录
         - 开发板介绍
             - [Hi3516开发板介绍](quickstart-ide-standard-board-introduction-hi3516.md)
-            - [Hi3751开发板介绍](quickstart-ide-standard-board-introduction-hi3751.md)
             - [RK3568开发板介绍](quickstart-ide-standard-board-introduction-rk3568.md)
 - 标准系统快速入门（安装包方式）
     - [标准系统入门概述](quickstart-standard-overview.md)
@@ -85,11 +79,6 @@
             - [编译](quickstart-standard-running-hi3516-build.md)
             - [烧录](quickstart-standard-running-hi3516-burning.md)
             - [运行](quickstart-standard-running-hi3516-running.md)
-        - Hi3751开发板
-            - [编写“Hello World”程序](quickstart-standard-running-hi3751-create.md)
-            - [编译](quickstart-standard-running-hi3751-build.md)
-            - [烧录](quickstart-standard-running-hi3751-burning.md)
-            - [运行](quickstart-standard-running-hi3751-running.md)
         - RK3568开发板
             - [编写“Hello World”程序](quickstart-standard-running-rk3568-create.md)
             - [编译](quickstart-standard-running-rk3568-build.md)
@@ -102,6 +91,5 @@
     - 附录
         - 开发板介绍
             - [Hi3516开发板介绍](quickstart-standard-board-introduction-hi3516.md)
-            - [Hi3751开发板介绍](quickstart-standard-board-introduction-hi3751.md)
             - [RK3568开发板介绍](quickstart-standard-board-introduction-rk3568.md)
         - [参考信息](quickstart-standard-reference.md)
\ No newline at end of file