minor fix

Author: thomasWeise

README.md

@@ -147,7 +147,6 @@ It is under the GNU GENERAL PUBLIC LICENSE Version 2, June 1991 and the copyrigh
 ## 4. Contact
 If you have any questions or suggestions, please contact
 Prof. Dr. [Thomas Weise](https://thomasweise.github.io) (汤卫思教授)
-at the Institute of Applied Optimization (应用优化研究所, IAO)
 of the School of Artificial Intelligence and Big Data ([人工智能与大数据学院](http://www.hfuu.edu.cn/aibd))
 of [Hefei University](http://www.hfuu.edu.cn/english) ([合肥大学](http://www.hfuu.edu.cn)),
 in Hefei, Anhui, China (中国安徽省合肥市)