Remove stable/juno from gerritbot
Remove stable/juno from gerritbot

Remove stable/juno from gerritbot for those channels where all repos
have eol'ed juno.

Change-Id: If31256834e256697f759761cab00c74d0379bc36

noorul/os-project-config,Tesora/tesora-project-config,noorul/os-project-config,dongwenjuan/project-config,dongwenjuan/project-config,Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config