salvager: Remove PrintVolumeSummary

Nothing uses this function; remove it.

Reviewed-on: http://gerrit.openafs.org/6785
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
(cherry picked from commit d426e613b9a4802c3b404903f7122f6fd0046aba)

Change-Id: Ibca098550a073013228c4907fbbeab7f3c0333ae
Reviewed-on: http://gerrit.openafs.org/9460
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>