Update README.md

Author: dunzeng

README.md

@@ -402,7 +402,7 @@ The above results are obtained by running the [tutorial](https://github.com/SMIL
 
 ## Citation
 
-Please cite __FedLab__ in your publications if it helps your research:
+Please cite __FedLab__ if it helps your research:
 
 ```bibtex
 @article{JMLR:v24:22-0440,
@@ -416,19 +416,10 @@ Please cite __FedLab__ in your publications if it helps your research:
   url     = {http://jmlr.org/papers/v24/22-0440.html}
 }
 ```
-or
-```
-@article{zeng2021fedlab,
-  title={Fedlab: A flexible federated learning framework},
-  author={Zeng, Dun and Liang, Siqi and Hu, Xiangjing and Wang, Hui and Xu, Zenglin},
-  journal={arXiv preprint arXiv:2107.11621},
-  year={2021}
-}
-```
 
 ## Contact
 
-Project Investigator: [Prof. Zenglin Xu](https://scholar.google.com/citations?user=gF0H9nEAAAAJ&hl=en) ([email protected]).
+Project Investigator: [Prof. Zenglin Xu](https://scholar.google.com/citations?user=gF0H9nEAAAAJ&hl=en).
 
 For technical issues related to __FedLab__ development, please contact our development team through Github issues or email: