Deorbit upserver from the quickstart guide

It's not the recommended way to push updates anymore,
and clutters up the guide.

Change-Id: I248380f12609a2ca03f47602773dc08f230b6fbe
Reviewed-on: http://gerrit.openafs.org/11578
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: D Brashear <shadow@your-file-system.com>