[PATCH -next] scsi: smartpqi: remove set but not used variable 'ctrl_info'

[YueHaibing]

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/scsi/smartpqi/smartpqi_init.c: In function 'pqi_driver_version_show':
drivers/scsi/smartpqi/smartpqi_init.c:6164:24: warning:
 variable 'ctrl_info' set but not used [-Wunused-but-set-variable]

commit 6d90615f1346 ("scsi: smartpqi: add sysfs entries") add it but never
use, so remove it also variable 'shost'

Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/scsi/smartpqi/smartpqi_init.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/scsi/smartpqi/smartpqi_init.c 
b/drivers/scsi/smartpqi/smartpqi_init.c
index ea5409bebf57..b9e7dabee1e5 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -6160,12 +6160,6 @@ static ssize_t pqi_firmware_version_show(struct device 
*dev,
 static ssize_t pqi_driver_version_show(struct device *dev,
        struct device_attribute *attr, char *buffer)
 {
-       struct Scsi_Host *shost;
-       struct pqi_ctrl_info *ctrl_info;
-
-       shost = class_to_shost(dev);
-       ctrl_info = shost_to_hba(shost);
-
        return snprintf(buffer, PAGE_SIZE,
                "%s\n", DRIVER_VERSION BUILD_TIMESTAMP);
 }