bozo: remove duplicate prototype

Remove duplicate function prototype.

Reviewed-on: http://gerrit.openafs.org/5496
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>
(cherry picked from commit fab921de67fe2bfbf6967c2e1cbf27230aad8bb2)

Change-Id: I6074ff7d8cdb6b3360ad4064b524d22ab6afe61c
Reviewed-on: http://gerrit.openafs.org/11220
Reviewed-by: Perry Ruiter <pruiter@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>
Tested-by: Stephan Wiesand <stephan.wiesand@desy.de>