Terminate empty JingleSessions immediately, not in an idle
Terminate empty JingleSessions immediately, not in an idle

I don't think the reason for delaying this given in (deleted) comment is
valid. All that MediaStream does in response to 'content-removed' is to
emit 'closed' if it hasn't already; when a JingleSession is terminated it
closes all the associated MediaStreams anyway.

mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,community-ssu/telepathy-gabble,community-ssu/telepathy-gabble,community-ssu/telepathy-gabble,Ziemin/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,community-ssu/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble