Simplify

examples/retained_image/src/main.rs

@@ -1,6 +1,6 @@
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
 
-use eframe::egui::{self, ViewportRender};
+use eframe::egui::{self};
 use egui_extras::RetainedImage;
 
 fn main() -> Result<(), eframe::Error> {
@@ -34,17 +34,7 @@ impl Default for MyApp {
 }
 
 impl eframe::App for MyApp {
-    fn update(
-        &mut self,
-        ctx: &egui::Context,
-        _frame: &mut eframe::Frame,
-        render: Option<&ViewportRender>,
-    ) {
-        if let Some(render) = render {
-            render(ctx);
-            return;
-        }
-
+    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
         let Self {
             image,
             rounding,