libvlc_media_list: remove unused feature

lib/media_list.c

@@ -166,8 +166,6 @@ libvlc_media_list_new( libvlc_instance_t * p_inst )
         return NULL;
     }
 
-    /* Code for that one should be handled in flat_media_list.c */
-    p_mlist->p_flat_mlist = NULL;
     p_mlist->b_read_only = false;
 
     libvlc_event_manager_register_event_type( p_mlist->p_event_manager,

lib/media_list_internal.h

@@ -46,10 +46,6 @@ struct libvlc_media_list_t
                                        * mlist comes, if any. */
     vlc_array_t                items;
 
-    /* Other way to see that media list */
-    /* Used in flat_media_list.c */
-    libvlc_media_list_t *       p_flat_mlist;
-
     /* This indicates if this media list is read-only
      * from a user point of view */
     bool                  b_read_only;