tmscim: remove unused SCSI_IRQ_NONE macro definition

This macro is only used in the NCR5380 drivers and they don't include
this header.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/scsi/tmscsim.h

@@ -10,8 +10,6 @@
 
 #include <linux/types.h>
 
-#define SCSI_IRQ_NONE 255
-
 #define MAX_ADAPTER_NUM 	4
 #define MAX_SG_LIST_BUF 	16	/* Not used */
 #define MAX_SCSI_ID		8