docs(about): update about page

docs/about.md

@@ -16,7 +16,7 @@ description: "The goals, credits and contact information about SpaceVim."
 
 ## History
 
-SpaceVim started in December 2016 as a spin-off from @wsdjeg's [DotFiles repository](https://github.com/wsdjeg/DotFiles).
+This project started in December 2016, which is derived from @wsdjeg's [DotFiles repository](https://github.com/wsdjeg/DotFiles).
 An early idea for modular configuration came from the Vim configuration by airline's author.
 The earliest version was further influenced by spacemacs' layer concept.
 
@@ -36,10 +36,6 @@ Please be advised that weekends and public holidays might delay response time.
 
 ## Credits & Thanks
 
-This project exists thanks to all the people who have contributed:
-
-<a href="https://github.com/SpaceVim/SpaceVim/graphs/contributors"><img src="https://opencollective.com/spacevim/contributors.svg?width=890&button=false" /></a>
-
 - [Hack-SpaceVim](https://github.com/Gabirel/Hack-SpaceVim) by [@Gabirel](https://github.com/Gabirel)
 - [SpaceVimTutorial](https://everettjf.gitbooks.io/spacevimtutorial/content/) by [@everettjf](https://github.com/everettjf)
 - [10-minutes-to-SpaceVim](https://github.com/Jackiexiao/10-minutes-to-SpaceVim) by [@Jackiexiao](https://github.com/Jackiexiao)

docs/cn/about.md

@@ -37,10 +37,6 @@ SpaceVim 这一项目起源于 2016 年 12 月份，是由 @wsdjeg 的 [DotFiles
 
 ## 特别鸣谢
 
-感谢所有参与 SpaceVim 开发的用户：
-
-<a href="https://github.com/SpaceVim/SpaceVim/graphs/contributors"><img src="https://opencollective.com/spacevim/contributors.svg?width=890&button=false" /></a>
-
 - [@Gabirel](https://github.com/Gabirel) 及其 [Hack-SpaceVim](https://github.com/Gabirel/Hack-SpaceVim)
 - [vimdoc](https://github.com/google/vimdoc)：帮助文档自动生成工具
 - SpaceVim 中涉及到的所有插件的作者