win32: update win32 exports
win32: update win32 exports

Remove the _hook_id() methods we made internal in the prev commit.

centricular/gstreamer,centricular/gstreamer,centricular/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer