This was only used by system playlists to keep the unplayed, most played,
and least played playlist up to date. We can handle this internally
through the playlist_played() handler.
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>
The pl_library_init() function is used to allocate a playlist for each
library path already in the database, and pl_library_deinit() is then
used to free this memory during cleanup.
Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>