docs: remove cdn.d2.pub

README.zh.md

@@ -31,7 +31,6 @@
 | 位置 | 链接 | 部署位置 |
 | --- | --- | --- |
 | d2.pub | [preview](https://d2.pub/d2-admin/preview) | 中国服务器 |
-| cdn.d2.pub | [preview](https://cdn.d2.pub/d2-admin/preview) | 七牛云 CDN |
 | github | [preview](https://d2-projects.github.io/d2-admin) | GitHub pages |
 | netlify | [preview](https://d2-admin.netlify.com) | Netlify CDN |
 
@@ -39,8 +38,6 @@
 
 [在 https://d2.pub 上的本项目文档](https://d2.pub/zh/doc/d2-admin/)
 
-> d2.pub CDN 镜像部署 [https://cdn.d2.pub](https://cdn.d2.pub)
-
 ## 功能
 
 * 使用 vue-cli3 构建