wip: new old arranger scenes

crates/device/src/arranger/arranger_tracks.rs

@@ -69,21 +69,6 @@ pub trait HasTracks: Has<Vec<Track>> + Send + Sync {
     const TRACK_SPACING: usize = 0;
 }
 
-impl<'a> ArrangerView<'a> {
-    pub(crate) fn tracks_with_sizes_scrolled (&'a self)
-        -> impl TracksSizes<'a>
-    {
-        self.arrangement
-            .tracks_with_sizes(
-                &self.arrangement.selection(),
-                self.is_editing.then_some(20/*FIXME*/)
-            )
-            .map_while(move|(t, track, x1, x2)|{
-                (self.width_mid > x2 as u16).then_some((t, track, x1, x2))
-            })
-    }
-}
-
 impl Arrangement {
     /// Add multiple tracks
     pub fn tracks_add (