Remove ALSA from default driver list while it's in dev.
Remove ALSA from default driver list while it's in dev.

--HG--
extra : convert_revision : svn%3A14d46d22-621c-0410-bb3d-6f67920f7d95/trunk%401204

infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore