staging: unisys: remove unused #define MAX_SERIAL_NUM

This patch simply removes #define MAX_SERIAL_NUM from iochannel.h
Signed-off-by: Erik Arfvidson <erik.arfvidson@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/common-spar/include/channels/iochannel.h

@@ -140,10 +140,6 @@
 * MAX_SKB_FRAGS size, which is 18 which is smaller than MAX_PHYS_INFO for
 * now.  */
 
-#ifndef MAX_SERIAL_NUM
-#define MAX_SERIAL_NUM		32
-#endif				/* MAX_SERIAL_NUM */
-
 #define MAX_SCSI_BUSES		1
 #define MAX_SCSI_TARGETS	8
 #define MAX_SCSI_LUNS		16