staging: unisys: visorhba: remove prototypes for visorhba_main.c

Remove not needed prototypes in visorhba.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>