Do not run /usr/bin/copr-update-builder script

No such script is currently provided by `copr-builder` package
and therefore the playbook fails and we are not able to spawn
builders for Copr

roles/copr/backend/files/provision/provision_builder_tasks.yml

@@ -76,8 +76,8 @@
   dnf: state=latest pkg=copr-builder
   when: devel
 
-- name: run /bin/copr-update-builder from copr-builder package
-  shell: /usr/bin/copr-update-builder
+# - name: run /bin/copr-update-builder from copr-builder package
+#   shell: /usr/bin/copr-update-builder
 
 - name: put updated mock configs into /etc/mock
   copy: src=files/mock/ dest=/etc/mock