toplevel: remove focus_node

src/ifs/wl_surface/wl_subsurface.rs

@@ -7,6 +7,7 @@ use {
         },
         leaks::Tracker,
         object::{Object, Version},
+        tree::Node,
         utils::{
             clonecell::CloneCell,
             linkedlist::{LinkedNode, NodeRef},
@@ -375,6 +376,10 @@ impl SurfaceExt for WlSubsurface {
         Some(self)
     }
 
+    fn focus_node(&self) -> Option<Rc<dyn Node>> {
+        self.parent.ext.get().focus_node()
+    }
+
     fn consume_pending_child(
         &self,
         surface: &WlSurface,