docs: remove warning in '/'

Author: ulivz

packages/docs/docs/README.md

@@ -27,11 +27,6 @@ footer: MIT Licensed | Copyright © 2018-present Evan You
 
 ### As Easy as 1, 2, 3
 
-::: warning 
-Note that this is the documentation of 1.x.x, if you are a 0.x.x user please go to: [https://v0.vuepress.vuejs.org.](https://v0.vuepress.vuejs.org).
-Since 1.x.x is still in the `alpha` stage, all APIs would change before we reach the `rc` stage, so do not use in production yet unless you are adventurous.
-:::
-
 ``` bash
 # install
 yarn global add vuepress@next 

packages/docs/docs/zh/README.md

@@ -15,11 +15,6 @@ footer: MIT Licensed | Copyright © 2018-present Evan You
 
 ### 像数 1, 2, 3 一样容易
 
-::: warning 
-Note that this is the documentation of 1.x.x, if you are a 0.x.x user please go to: [https://v0.vuepress.vuejs.org.](https://v0.vuepress.vuejs.org).
-Since 1.x.x is still in the `alpha` stage, all APIs would change before we reach the `rc` stage, so do not use in production yet unless you are adventurous.
-:::
-
 ``` bash
 # 安装
 yarn global add vuepress # 或者：npm install -g vuepress