Remove extra command and note which confuses the user
Remove extra command and note which confuses the user

As we have mentioned in prerequisites there is no
need of the note which is removed in this patch

Change-Id: I88d1020fd40f2727738809e3a2a81c6f8514475f
Closes-Bug: #1708842
Closes-Bug: #1708841
openstack/tacker,stackforge/tacker,openstack/tacker,stackforge/tacker,openstack/tacker