Fix clippy and revert test changes to simple example.

examples/simple.rs

@@ -53,10 +53,8 @@ impl Default for MyApp {
 
 impl eframe::App for MyApp {
     fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
-        Window::new("test").show(ctx, |ui| {
-            DockArea::new(&mut self.tree)
-                .style(Style::from_egui(ui.style().as_ref()))
-                .show_inside(ui, &mut TabViewer {});
-        });
+        DockArea::new(&mut self.tree)
+            .style(Style::from_egui(ctx.style().as_ref()))
+            .show(ctx, &mut TabViewer {});
     }
 }

src/widgets/dock_area/show/leaf.rs

@@ -295,11 +295,7 @@ impl<'tree, Tab> DockArea<'tree, Tab> {
                     fade,
                 );
                 let title_id = response.id;
-
-                let (close_hovered, close_clicked, close_rect) = close_response
-                    .map(|res| (res.hovered(), res.clicked(), res.rect))
-                    .unwrap_or((false, false, Rect::ZERO));
-
+                let close_clicked = close_response.is_some_and(|res| res.clicked());
                 let is_lonely_tab = self.dock_state[surface_index].num_tabs() == 1;
 
                 if self.show_tab_name_on_hover {

src/widgets/dock_area/show/mod.rs

@@ -1,6 +1,6 @@
 use egui::{
-    CentralPanel, Color32, Context, CursorIcon, EventFilter, Frame, Key, LayerId, Order, Pos2,
-    Rect, Rounding, Sense, Ui, Vec2,
+    CentralPanel, Color32, Context, CursorIcon, EventFilter, Frame, Key, Pos2, Rect, Rounding,
+    Sense, Ui, Vec2,
 };
 
 use duplicate::duplicate;