scsi: target: iscsi: Remove unused macro PRINT_BUF

Remove unused macro to fix the following compilation warning:

drivers/target//iscsi/iscsi_target_util.c:31: warning: macro "PRINT_BUFF" is not used [-Wunused-macros]
	#define PRINT_BUFF(buff, len)     \

Link: https://lore.kernel.org/r/20210228055645.22253-12-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/iscsi/iscsi_target_util.c

@@ -28,23 +28,6 @@
 #include "iscsi_target_util.h"
 #include "iscsi_target.h"
 
-#define PRINT_BUFF(buff, len)					\
-{								\
-	int zzz;						\
-								\
-	pr_debug("%d:\n", __LINE__);				\
-	for (zzz = 0; zzz < len; zzz++) {			\
-		if (zzz % 16 == 0) {				\
-			if (zzz)				\
-				pr_debug("\n");			\
-			pr_debug("%4i: ", zzz);			\
-		}						\
-		pr_debug("%02x ", (unsigned char) (buff)[zzz]);	\
-	}							\
-	if ((len + 1) % 16)					\
-		pr_debug("\n");					\
-}
-
 extern struct list_head g_tiqn_list;
 extern spinlock_t tiqn_lock;