layout: Remove width and is_full_width from InsertHint

They were unused.

src/layout/mod.rs

@@ -2792,8 +2792,6 @@ impl<W: LayoutElement> Layout<W> {
 
                 ws.set_insert_hint(InsertHint {
                     position,
-                    width: move_.width,
-                    is_full_width: move_.is_full_width,
                     corner_radius,
                 });
             }

src/layout/scrolling.rs

@@ -110,8 +110,6 @@ pub enum InsertPosition {
 #[derive(Debug)]
 pub struct InsertHint {
     pub position: InsertPosition,
-    pub width: ColumnWidth,
-    pub is_full_width: bool,
     pub corner_radius: CornerRadius,
 }