Remove myself from release-manager slack group

As part of my offboarding kubernetes/sig-release#1442

Signed-off-by: Gianluca Arbezzano <[email protected]>

Author: Gianluca Arbezzano

communication/slack-config/sig-release/usergroups.yaml

@@ -17,7 +17,6 @@ usergroups:
       - ameukam # Release Manager Associate
       - cpanato # Release Manager
       - feiskyer # Release Manager
-      - gianarb # Release Manager Associate
       - hasheddan # subproject owner / Release Manager
       - idealhack # Release Manager
       - jimangel # Release Manager Associate