Remove artist from playlist save format

Shenanigans from artists can result in really long artist names.  I don't think I've seen that with album names.  If things change then I may have to rethink this later.

Author: shinji257

zotify/config.py

@@ -75,11 +75,11 @@
     TEMP_DOWNLOAD_DIR:          { 'default': '',      'type': str,  'arg': '--temp-download-dir'          }
 }
 
-OUTPUT_DEFAULT_PLAYLIST_EXT = '{artist}/{album}.{album_id}/{song_name}.{ext}'
+OUTPUT_DEFAULT_PLAYLIST_EXT = '{album}.{album_id}/{song_name}.{ext}'
 OUTPUT_DEFAULT_LIKED_SONGS = 'Liked Songs/{song_name}.{ext}'
 OUTPUT_DEFAULT_SINGLE = '{artist}/{album}.{album_id}/{song_name}.{ext}'
 OUTPUT_DEFAULT_ALBUM = '{artist}/{album}.{album_id}/{song_name}.{ext}'
-OUTPUT_DEFAULT_PLAYLIST = '{artist}/{album}.{album_id}/{song_name}.{ext}'
+OUTPUT_DEFAULT_PLAYLIST = '{album}.{album_id}/{song_name}.{ext}'
 
 class Config:
     Values = {}