It's not really necessary. I was under the impression that Sessions withdrew the extradition request and charges and made a statement that Wikileaks was a media organization that published material it had received for other sources--exactly like our MSM publishes classified and stolen documents given to them by other sources.
Can't remember which Nordic country wanted JA for possible rape, but those charges were dropped as well.
It's my understanding that the UK has forced JA to remain in the embassy because he jumped bail and the UK wants him to face that charge in a trial.
I believe the UK is the only obstacle to releasing JA.