Drop a no-longer-relevant note

Modern Ansible handles this just fine.

Change-Id: Iea4d0499b92e2449ef8bc01651af6d3548ceab20

ansible/site.yml

@@ -727,8 +727,6 @@
         tags: ovn,
         when: enable_ovn | bool }
 
-# NOTE(gmmaha): Please do not change the order listed here. The current order is a
-# workaround to fix the bug https://bugs.launchpad.net/kolla/+bug/1546789
 - name: Apply role neutron
   gather_facts: false
   hosts: