[AIRFLOW-5650] remove githubhandle (apache#6328)

Author: koshys

README.md

@@ -251,7 +251,7 @@ Currently **officially** using Airflow:
 1. [Groupalia](http://es.groupalia.com) [[@jesusfcr](https://github.com/jesusfcr)]
 1. [Groupon](https://groupon.com) [[@stevencasey](https://github.com/stevencasey)]
 1. [Growbots](https://www.growbots.com/)[[@exploy](https://github.com/exploy)]
-1. [GSN Games](https://www.gsngames.com) [[@koshys](https://github.com/koshys)]
+1. [GSN Games](https://www.gsngames.com)
 1. [Gusto](https://gusto.com) [[@frankhsu](https://github.com/frankhsu)]
 1. [Handshake](https://joinhandshake.com/) [[@mhickman](https://github.com/mhickman)]
 1. [Handy](http://www.handy.com/careers/73115?gh_jid=73115&gh_src=o5qcxn) [[@marcintustin](https://github.com/marcintustin) / [@mtustin-handy](https://github.com/mtustin-handy)]