diff --git a/crates/eframe/src/epi.rs b/crates/eframe/src/epi.rs
index c37dc1cf6..ccc120707 100644
--- a/crates/eframe/src/epi.rs
+++ b/crates/eframe/src/epi.rs
@@ -6,9 +6,6 @@
 
 #![warn(missing_docs)] // Let's keep `epi` well-documented.
 
-#[cfg(target_arch = "wasm32")]
-use std::any::Any;
-
 #[cfg(not(target_arch = "wasm32"))]
 #[cfg(any(feature = "glow", feature = "wgpu_no_default_features"))]
 pub use crate::native::winit_integration::UserEvent;
@@ -176,26 +173,6 @@ pub trait App {
         _ = (ctx, frame);
     }
 
-    /// Get a handle to the app.
-    ///
-    /// Can be used from web to interact or other external context.
-    ///
-    /// You need to implement this if you want to be able to access the application from JS using [`crate::WebRunner::app_mut`].
-    ///
-    /// This is needed because downcasting `Box<dyn App>` -> `Box<dyn Any>` to get &`ConcreteApp` is not simple in current rust.
-    ///
-    /// Just copy-paste this as your implementation:
-    /// ```ignore
-    /// #[cfg(target_arch = "wasm32")]
-    /// fn as_any_mut(&mut self) -> Option<&mut dyn std::any::Any> {
-    ///     Some(&mut *self)
-    /// }
-    /// ```
-    #[cfg(target_arch = "wasm32")]
-    fn as_any_mut(&mut self) -> Option<&mut dyn Any> {
-        None
-    }
-
     /// Called on shutdown, and perhaps at regular intervals. Allows you to save state.
     ///
     /// Only called when the "persistence" feature is enabled.
diff --git a/crates/eframe/src/web/app_runner.rs b/crates/eframe/src/web/app_runner.rs
index 11654135d..e915a9952 100644
--- a/crates/eframe/src/web/app_runner.rs
+++ b/crates/eframe/src/web/app_runner.rs
@@ -184,9 +184,7 @@ impl AppRunner {
     ///
     /// This will panic if your app does not implement [`App::as_any_mut`].
     pub fn app_mut<ConcreteApp: 'static + App>(&mut self) -> &mut ConcreteApp {
-        self.app
-            .as_any_mut()
-            .expect("Your app must implement `as_any_mut`, but it doesn't")
+        (self.app.as_mut() as &mut dyn std::any::Any)
             .downcast_mut::<ConcreteApp>()
             .expect("app_mut got the wrong type of App")
     }
diff --git a/crates/egui_demo_app/src/wrap_app.rs b/crates/egui_demo_app/src/wrap_app.rs
index 5dcc89a3e..ba572ea8d 100644
--- a/crates/egui_demo_app/src/wrap_app.rs
+++ b/crates/egui_demo_app/src/wrap_app.rs
@@ -3,9 +3,6 @@ use egui_demo_lib::{DemoWindows, is_mobile};
 #[cfg(feature = "glow")]
 use eframe::glow;
 
-#[cfg(target_arch = "wasm32")]
-use core::any::Any;
-
 use crate::DemoApp;
 
 #[derive(Default)]
@@ -323,11 +320,6 @@ impl eframe::App for WrapApp {
             custom3d.on_exit(gl);
         }
     }
-
-    #[cfg(target_arch = "wasm32")]
-    fn as_any_mut(&mut self) -> Option<&mut dyn Any> {
-        Some(&mut *self)
-    }
 }
 
 impl WrapApp {