egui: upgrade to 0.34

src/control_center/cc_window.rs

@@ -25,7 +25,6 @@ use {
     },
     linearize::Linearize,
     std::{
-        any::Any,
         mem,
         rc::{Rc, Weak},
     },
@@ -453,10 +452,6 @@ impl CacheTrait for WindowPropertyListeners {
     fn len(&self) -> usize {
         self.listeners.len()
     }
-
-    fn as_any_mut(&mut self) -> &mut dyn Any {
-        self
-    }
 }
 
 fn show_content_types(ui: &mut Ui, ct: &mut ContentType) -> bool {