remove attribution for the icon

Author: zeapo

README.md

@@ -109,5 +109,3 @@ This project uses three libraries:
 
 - [JGit](http://www.eclipse.org/jgit/) a pretty good git lib
 - [Apache's FileUtils](https://commons.apache.org/proper/commons-io/) for files manipulations
-
-The icon used for this Application was made by [José García](https://www.iconfinder.com/josealonsogarcia) under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/) licence.