scsi: mptscsih: Remove set but not used 'timeleft'

This addresses the following gcc warning with "make W=1":

drivers/message/fusion/mptscsih.c: In function ‘mptscsih_IssueTaskMgmt’:
drivers/message/fusion/mptscsih.c:1519:17: warning: variable ‘timeleft’
set but not used [-Wunused-but-set-variable]
 1519 |  unsigned long  timeleft;
      |                 ^~~~~~~~

Link: https://lore.kernel.org/r/20200827125925.428357-1-yanaijie@huawei.comReported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/message/fusion/mptscsih.c

@@ -1516,7 +1516,6 @@ mptscsih_IssueTaskMgmt(MPT_SCSI_HOST *hd, u8 type, u8 channel, u8 id, u64 lun,
 	int		 ii;
 	int		 retval;
 	MPT_ADAPTER 	*ioc = hd->ioc;
-	unsigned long	 timeleft;
 	u8		 issue_hard_reset;
 	u32		 ioc_raw_state;
 	unsigned long	 time_count;
@@ -1614,7 +1613,7 @@ mptscsih_IssueTaskMgmt(MPT_SCSI_HOST *hd, u8 type, u8 channel, u8 id, u64 lun,
 		}
 	}
 
-	timeleft = wait_for_completion_timeout(&ioc->taskmgmt_cmds.done,
+	wait_for_completion_timeout(&ioc->taskmgmt_cmds.done,
 		timeout*HZ);
 	if (!(ioc->taskmgmt_cmds.status & MPT_MGMT_STATUS_COMMAND_GOOD)) {
 		retval = FAILED;