Update README.en_US.md

Author: atjiu

README.en_US.md

@@ -59,13 +59,6 @@ Project test cases have not been written yet!
 
 Welcome everyone to submit issues and pr
 
-## Donation
-
-![image](https://cloud.githubusercontent.com/assets/6915570/18000010/9283d530-6bae-11e6-8c34-cd27060b9074.png)
-![image](https://cloud.githubusercontent.com/assets/6915570/17999995/7c2a4db4-6bae-11e6-891c-4b6bc4f00f4b.png)
-
-**If you feel that this project is helpful to you, welcome to donate!**
-
 ## License
 
 GNU AGPLv3