[install] Remove an unnecessary step
[install] Remove an unnecessary step

This step leads apache2 service restart error. All works fine after
ignoring this step.

Change-Id: I5124fde96c93173598732f67d610628159c144c9
Closes-Bug: #1631749

openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals