update README

Author: jiajunhui

README.md

@@ -476,7 +476,6 @@ PlayerBase是基于事件分发来完成各组件间协作的问题，定义了
 ![image](https://github.com/jiajunhui/PlayerBase/raw/master/screenshot/frame_structure03.png)
 ![image](https://github.com/jiajunhui/PlayerBase/raw/master/screenshot/frame_structure04.png)
 
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 # 交流
 联系方式：junhui_jia@163.com
 QQ群：600201778