kv: remove test deadline in favour of global timeout
kv: remove test deadline in favour of global timeout

Fixes #3361.

bg451/cockroach,marcuswestin/cockroach,sunya123/cockroach,maxlang/cockroach,bg451/cockroach,il9ue/cockroach,vivekmenezes/cockroach,petermattis/cockroach,sunya123/cockroach,sunya123/cockroach,cuongdo/cockroach,vivekmenezes/cockroach,veteranlu/cockroach,cockroachdb/cockroach,il9ue/cockroach,maxlang/cockroach,maxlang/cockroach,sunya123/cockroach,glycerine/cockroach,paperstreet/cockroach,sunya123/cockroach,vaibhavarora/cockroach,cuongdo/cockroach,cuongdo/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,vivekmenezes/cockroach,petermattis/cockroach,nieyy/cockroach,marcuswestin/cockroach,marcuswestin/cockroach,veteranlu/cockroach,glycerine/cockroach,bg451/cockroach,petermattis/cockroach,il9ue/cockroach,nieyy/cockroach,cockroachdb/cockroach,il9ue/cockroach,cockroachdb/cockroach,vivekmenezes/cockroach,glycerine/cockroach,bg451/cockroach,il9ue/cockroach,arjun4084346/cockroach,veteranlu/cockroach,nieyy/cockroach,arjun4084346/cockroach,veteranlu/cockroach,nieyy/cockroach,arjun4084346/cockroach,marcuswestin/cockroach,marcuswestin/cockroach,paperstreet/cockroach,vivekmenezes/cockroach,glycerine/cockroach,marcuswestin/cockroach,il9ue/cockroach,arjun4084346/cockroach,vaibhavarora/cockroach,cockroachdb/cockroach,arjun4084346/cockroach,cockroachdb/cockroach,sunya123/cockroach,arjun4084346/cockroach,veteranlu/cockroach,maxlang/cockroach,sunya123/cockroach,il9ue/cockroach,arjun4084346/cockroach,il9ue/cockroach,bg451/cockroach,glycerine/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,petermattis/cockroach,marcuswestin/cockroach,nieyy/cockroach,vaibhavarora/cockroach,glycerine/cockroach,vivekmenezes/cockroach,bg451/cockroach,glycerine/cockroach,cuongdo/cockroach,paperstreet/cockroach,vivekmenezes/cockroach,cuongdo/cockroach,paperstreet/cockroach,maxlang/cockroach,maxlang/cockroach,bg451/cockroach,veteranlu/cockroach,petermattis/cockroach,cockroachdb/cockroach,nieyy/cockroach,cockroachdb/cockroach,petermattis/cockroach,veteranlu/cockroach,maxlang/cockroach,cockroachdb/cockroach,veteranlu/cockroach,arjun4084346/cockroach,maxlang/cockroach,cuongdo/cockroach,glycerine/cockroach,marcuswestin/cockroach,petermattis/cockroach,nieyy/cockroach,cuongdo/cockroach,sunya123/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,vivekmenezes/cockroach,petermattis/cockroach,nieyy/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,cuongdo/cockroach