docs: clean-up readme (#1866)

📝 Docs: update readme

Signed-off-by: bitliu <bitliu@tencent.com>

README.md

@@ -26,15 +26,13 @@ Kubernetes-based application gateway.
 
 ## Community Meeting
 
-The Envoy Gateway team meets every Tuesday and Thursday. We also have a separate meeting to be held in the 
+The Envoy Gateway team meets every Tuesday and Thursday. We also have a separate meeting to be held in the
 Chinese timezone every two weeks to better accommodate our Chinese community members who
 face scheduling difficulties for the weekly meetings. Please refer to the meeting details for additional information.
 
 * [Meeting details][meeting]
 
-
 [meeting]: https://docs.google.com/document/d/1leqwsHX8N-XxNEyTflYjRur462ukFxd19Rnk3Uzy55I/edit?usp=sharing
-[group]: https://groups.google.com/forum/#!forum/envoy-gateway-developers
 [blog]: https://blog.envoyproxy.io/introducing-envoy-gateway-ad385cc59532
 [Envoy Slack workspace]: https://communityinviter.com/apps/envoyproxy/envoy
 [Envoy Gateway channel]: https://envoyproxy.slack.com/archives/C03E6NHLESV