public void unsubscribe(String jid) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
        unsubscribe(jid, null);
    }
public void unsubscribe ( String jid ) throws NoResponseException , XMPPErrorException , NotConnectedException , InterruptedException { unsubscribe ( jid , null ) ; }
Remove the subscription related to the specified JID.  This will only
work if there is only 1 subscription.  If there are multiple subscriptions,
use {@link #unsubscribe(String, String)}.

@param jid The JID used to subscribe to the node
@throws XMPPErrorException
@throws NoResponseException
@throws NotConnectedException
@throws InterruptedException