[www] Do not link to old Japanese Ops Guide
[www] Do not link to old Japanese Ops Guide

This guide has been converted and is not published anymore, do not link
to it.

This is in preparation for moving to the new website, the content will
not be available there.

Change-Id: I4c2f5e2a831699bad11353f3d59e09ad3ef5a973

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