scsi: qla2xxx: Remove unused variable 'status'

Fix the clang build warning:

  drivers/scsi/qla2xxx/qla_nx.c:2209:6: error: variable 'status' set but not used [-Werror,-Wunused-but-set-variable]
        int status = 0;

Link: https://lore.kernel.org/r/20210726201924.3202278-4-morbo@google.com
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Bill Wendling <morbo@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_nx.c

@@ -2166,7 +2166,6 @@ qla82xx_poll(int irq, void *dev_id)
 	struct qla_hw_data *ha;
 	struct rsp_que *rsp;
 	struct device_reg_82xx __iomem *reg;
-	int status = 0;
 	uint32_t stat;
 	uint32_t host_int = 0;
 	uint16_t mb[8];
@@ -2195,7 +2194,6 @@ qla82xx_poll(int irq, void *dev_id)
 		case 0x10:
 		case 0x11:
 			qla82xx_mbx_completion(vha, MSW(stat));
-			status |= MBX_INTERRUPT;
 			break;
 		case 0x12:
 			mb[0] = MSW(stat);