storage: don't bother setting members to nil
storage: don't bother setting members to nil

The stopper having stopped is not a guarantee that no more calls to the
queue will occur. It buys us nothing to set these members to nil, so
just leave them be.

Fixes #4220.

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