Prune commentary and stale Rust port notes

core/src/widget/widgets.rs

@@ -11,10 +11,6 @@ pub struct Widgets {
     send: Sender<WidgetId>,
     recv: Receiver<WidgetId>,
     pub(crate) waiting: HashSet<WidgetId>,
-    /// Every widget that has ever been given an explicit `.label()` --
-    /// `ui::access::AccessTree` walks exactly this set, not the whole
-    /// arena, so a widget nobody named costs it nothing. Symmetric with
-    /// `free_next` below, which is this set's one removal path.
     named: HashSet<WidgetId>,
 }
 
@@ -44,8 +40,6 @@ impl Widgets {
         Some(self.vec.get_mut(id)?.widget.as_mut())
     }
 
-    /// get_dyn but dynamic borrow checking of widgets
-    /// lets you do recursive (tree) operations, like the painter does
     pub(crate) fn get_dyn_dynamic<'a>(&self, id: WidgetId) -> WidgetWrapper<'a> {
         // SAFETY: must guarantee no other mutable references to this widget exist
         // done through the borrow variable
@@ -101,18 +95,12 @@ impl Widgets {
         &self.data(id.id()).unwrap().label
     }
 
-    /// Also the one place a widget opts into `ui::access`'s AccessKit tree
-    /// (RUST.md's I4) -- see `named`'s doc comment.
     pub fn set_label(&mut self, id: impl IdLike, label: String) {
         let id = id.id();
         self.data_mut(id).unwrap().label = label;
         self.named.insert(id);
     }
 
-    /// Every widget with an explicit name, for `ui::access::AccessTree` to
-    /// walk. Order is unspecified; `AccessTree` doesn't need one; a screen
-    /// reader's own traversal is worked out by uiautomator from each
-    /// node's on-screen bounds instead.
     pub fn named(&self) -> impl Iterator<Item = WidgetId> + '_ {
         self.named.iter().copied()
     }