Removed outdated comment in setup-nodes role

Removed a comment noting that the format was conceptual
for the execution of os_ironic_node as that module had
not yet been written when the playbook was initially
written.

roles/bifrost-setup-nodes/tasks/main.yml

@@ -16,8 +16,6 @@
   local_action: stat path={{deploy_image}}
   register: test_deploy_image
 - name: "Deploy to Hardware"
-  # TODO: Conceptual idea of structure, needs image_source corrected and
-  # disk format clarified
   os_ironic_node:
     auth_plugin: None
     auth: None