Remove obsolete swift links
Remove obsolete swift links

The document openstack-object-storage has been removed several years ago
from docs.openstack.org, remove the link since there's no real
replacement for the content.

Also, swift.openstack.org is a redirect to docs.openstack.org, replace
the link with current location.

Change-Id: Ib3d5ea880df673125d412ad25c26a4a06d7482a2

stevelle/glance,openstack/glance,openstack/glance,stevelle/glance,rajalokan/glance,openstack/glance,rajalokan/glance