scsi: target: pscsi: Remove unused macro ISPRINT

Remove unused macro to fix the following compilation warning:

drivers/target//target_core_pscsi.c:37: warning: macro "ISPRINT" is not used [-Wunused-macros]
	#define ISPRINT(a)  ((a >= ' ') && (a <= '~'))

Link: https://lore.kernel.org/r/20210228055645.22253-7-chaitanya.kulkarni@wdc.comReviewed-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/target/target_core_pscsi.c

@@ -34,8 +34,6 @@
 #include "target_core_internal.h"
 #include "target_core_pscsi.h"
 
-#define ISPRINT(a)  ((a >= ' ') && (a <= '~'))
-
 static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev)
 {
 	return container_of(dev, struct pscsi_dev_virt, dev);