Merge pull request #6585 from kaslin/patch-1

Removing Matt Broberg from ContribComms

Author: k8s-ci-robot

communication/slack-config/usergroups.yaml

@@ -32,7 +32,6 @@ usergroups:
       - Debanitrkl
       - Jason
       - kaslin
-      - mbbroberg
       - paris
       - PurneswarPrasad
       - rajula96reddy