kv: Remove old TestRequestToUninitializedRange test
kv: Remove old TestRequestToUninitializedRange test

It's relying on us not retrying StoreNotFound errors (which is now
changing), and it's a complex test that may no longer be achieving what
it was originally intended to achieve anyways.

maxlang/cockroach,glycerine/cockroach,glycerine/cockroach,veteranlu/cockroach,maxlang/cockroach,petermattis/cockroach,petermattis/cockroach,paperstreet/cockroach,veteranlu/cockroach,petermattis/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,maxlang/cockroach,paperstreet/cockroach,maxlang/cockroach,petermattis/cockroach,veteranlu/cockroach,petermattis/cockroach,paperstreet/cockroach,veteranlu/cockroach,glycerine/cockroach,veteranlu/cockroach,glycerine/cockroach,petermattis/cockroach,vaibhavarora/cockroach,maxlang/cockroach,maxlang/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,maxlang/cockroach,veteranlu/cockroach,veteranlu/cockroach,paperstreet/cockroach,glycerine/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,petermattis/cockroach,vaibhavarora/cockroach,glycerine/cockroach,petermattis/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,maxlang/cockroach,paperstreet/cockroach,paperstreet/cockroach,glycerine/cockroach,glycerine/cockroach