chore[doc]: update doc

README.md

@@ -60,7 +60,6 @@ Perfect work development process, complete online solution
 - [tank-game-server](https://github.com/zfoo-project/tank-game-server) Online game《The Fight of Tanks》, novice friendly,
   difficulty 2 stars
 - [godot-bird](https://github.com/zfoo-project/godot-bird) bird and bird，powered by godot
-- [cocos-fivechess](https://github.com/zfoo-project/fivechess) five chess，use cocos as client
 - [FAQ](./doc/FAQ.md)，There are standard demo display and instructions in the test folder of each project directory,
   which can be run directly
 

README_CN.md

@@ -67,9 +67,6 @@
 
 - [godot-bird](https://github.com/zfoo-project/godot-bird) 鸟了个鸟，客户端使用godot开发，服务器依然使用的tank-game-server
 
-- [cocos-fivechess](https://github.com/zfoo-project/fivechess) 五子棋，客户端使用cocos开发
-
-- [zapp](https://github.com/zfoo-project/zapp) 图片分享聊天网站，标准的https企业级网站，难度5星
 
 Ⅴ. 使用⭐
 ------------