Update README.md

Author: narendasan

README.md

@@ -11,13 +11,8 @@ It provides the following capabilities:
 
 When registering as service specify the data encoding and when requesting a resource though groot make the request using json.
 
-Groot core development:
+[![Join the chat at https://acm-uiuc.slack.com/messages/C6XGZD212/](https://img.shields.io/badge/slack-groot-724D71.svg)](https://acm-uiuc.slack.com/messages/C6XGZD212/)
 
-[![Join the chat at https://gitter.im/acm-uiuc/groot-development](https://badges.gitter.im/acm-uiuc/groot-development.svg)](https://gitter.im/acm-uiuc/groot-development?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-
-Questions on how to add your app to Groot or use the Groot API:
-
-[![Join the chat at https://gitter.im/acm-uiuc/groot-users](https://badges.gitter.im/acm-uiuc/groot-users.svg)](https://gitter.im/acm-uiuc/groot-users?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)