Fixes gcc '-Wunused-but-set-variable' warning:
drivers/scsi/arcmsr/arcmsr_hba.c: In function 'arcmsr_drain_donequeue':
drivers/scsi/arcmsr/arcmsr_hba.c:1320:10: warning:
 variable 'lun' set but not used [-Wunused-but-set-variable]
drivers/scsi/arcmsr/arcmsr_hba.c:1320:6: warning:
 variable 'id' set but not used [-Wunused-but-set-variable]
Never used since introduction in commit 
ae52e7f09ff5 ("arcmsr: Support 1024 scatter-gather list entries and improve AP while FW trapped and behaviors of EHs").
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 
 
 static void arcmsr_drain_donequeue(struct AdapterControlBlock *acb, struct CommandControlBlock *pCCB, bool error)
 {
-       int id, lun;
        if ((pCCB->acb != acb) || (pCCB->startdone != ARCMSR_CCB_START)) {
                if (pCCB->startdone == ARCMSR_CCB_ABORTED) {
                        struct scsi_cmnd *abortcmd = pCCB->pcmd;
                        if (abortcmd) {
-                               id = abortcmd->device->id;
-                               lun = abortcmd->device->lun;                            
                                abortcmd->result |= DID_ABORT << 16;
                                arcmsr_ccb_complete(pCCB);
                                printk(KERN_NOTICE "arcmsr%d: pCCB ='0x%p' isr got aborted command \n",