Sweden presumably would rather not touch this hot potato. The prosecutor is doing her job in pursuing him, but the court doesn't fancy the prospect of having to deal with the US requests.
As I said here already, if Sweden doesn't ask for him, we should just deport him to Botany Bay. I have no wish to support him, but if if we send him to the US he becomes a political prisoner and I'll reluctantly have to do so.
Reg needs an icon for holding my nose!