scsi: qedf: Remove unnecessary code

Buffer 'msg' is memset() but never actually used. Drop it.

Link: https://lore.kernel.org/r/1650536693-13089-1-git-send-email-baihaowen@meizu.comSigned-off-by: Haowen Bai <baihaowen@meizu.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qedf/qedf_attr.c

@@ -131,7 +131,6 @@ qedf_sysfs_write_grcdump(struct file *filep, struct kobject *kobj,
 	struct qedf_ctx *qedf = NULL;
 	long reading;
 	int ret = 0;
-	char msg[40];
 
 	if (off != 0)
 		return ret;
@@ -148,7 +147,6 @@ qedf_sysfs_write_grcdump(struct file *filep, struct kobject *kobj,
 		return ret;
 	}
 
-	memset(msg, 0, sizeof(msg));
 	switch (reading) {
 	case 0:
 		memset(qedf->grcdump, 0, qedf->grcdump_size);