Leave selection of audiosink to playbin
Leave selection of audiosink to playbin

gconfaudiosink has been deprecated a while ago, so clutter-gst example
probably shouldn't use that. >eaving playbin to select the
audiosink should just do the right thing on all platforms, so we can
simply remove the audio sink selection code.

GNOME/clutter-gst,GNOME/clutter-gst,GNOME/clutter-gst,GNOME/clutter-gst