staging: unisys: visorbus: remove controlvm_respond_physdev_changestate

Remove the unneeded prototype declaration for function
controlvm_respond_physdev_changestate.
Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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>

drivers/staging/unisys/visorbus/visorchipset.c

@@ -328,10 +328,6 @@ static struct platform_device visorchipset_platform_device = {
 };
 
 /* Function prototypes */
-static void controlvm_respond_physdev_changestate(
-		struct controlvm_message_header *msg_hdr, int response,
-		struct spar_segment_state state);
-
 static void parser_done(struct parser_context *ctx);
 
 static uuid_le