Remove fedmsg and github2fedmsg from staging

The messaging bridges openshift project and github2fedmsg VM were
already removed in staging. This is to clean the ansible playbooks.

I will create a separate one for production after this one is merged.

Signed-off-by: Michal Konecny <mkonecny@redhat.com>

roles/bugzilla2fedmsg/tasks/main.yml

@@ -1,6 +1,4 @@
 ---
-# Setup a fedmsg-hub
-
 - name: Install needed packages
   ansible.builtin.package: name={{ item }} state=present
   with_items:

roles/bugzilla2fedmsg/templates/bugzilla2fedmsg.ini

@@ -5,8 +5,6 @@
 # Some configuration for our workers
 bugzilla.products = Fedora, Fedora EPEL
 
-# If you have 8 worker threads you *also* need 8 fedmsg endpoints in fedmsg.d/
-# and 8 open holes in the firewall
 bugzilla.num_workers = 1
 moksha.workers_per_consumer = 2
 moksha.threadpool_size = 5