remove QQ group (#11055)

Author: juzhiyuan

README.md

@@ -43,7 +43,6 @@ The technical architecture of Apache APISIX:
 ## Community
 
 - Mailing List: Mail to [email protected], follow the reply to subscribe to the mailing list.
-- QQ Group - 552030619, 781365357
 - Slack Workspace - [invitation link](https://apisix.apache.org/slack) (Please open an [issue](https://apisix.apache.org/docs/general/submit-issue) if this link is expired), and then join the #apisix channel (Channels -> Browse channels -> search for "apisix").
 - ![Twitter Follow](https://img.shields.io/twitter/follow/ApacheAPISIX?style=social) - follow and interact with us using hashtag `#ApacheAPISIX`
 - [Documentation](https://apisix.apache.org/docs/)