[gnome-music/wip/mschraal/assorted-cleanups: 30/32] coredisc: Remove unused function

[Marinus Schraal <mschraal src gnome org>]

commit dcabeffbb5fabdbe2e5e8f4942a9c2acba9f4849
Author: Marinus Schraal <mschraal gnome org>
Date:   Thu Mar 26 16:31:32 2020 +0100

    coredisc: Remove unused function

 gnomemusic/coredisc.py | 3 ---
 1 file changed, 3 deletions(-)
---
diff --git a/gnomemusic/coredisc.py b/gnomemusic/coredisc.py
index 2684bb7f..de421750 100644
--- a/gnomemusic/coredisc.py
+++ b/gnomemusic/coredisc.py
@@ -91,9 +91,6 @@ class CoreDisc(GObject.GObject):
         def _filter_func(core_song):
             return core_song.props.grlid in album_ids
 
-        def _reverse_sort(song_a, song_b, data=None):
-            return song_a.props.track_number - song_b.props.track_number
-
         def _callback(source, dunno, media, something, something2):
             if media is None:
                 if sorted(album_ids) == sorted(self._old_album_ids):