Remove unused blue rect entity

src/main.rs

@@ -34,13 +34,4 @@ fn main() {
 
 fn setup(mut commands: Commands) {
     commands.spawn(Camera2dBundle::default());
-    commands.spawn(SpriteBundle {
-        sprite: Sprite {
-            color: Color::rgb(0.25, 0.25, 0.75),
-            custom_size: Some(Vec2::new(50.0, 100.0)),
-            ..default()
-        },
-        transform: Transform::from_translation(Vec3::new(-50., 0., 0.)),
-        ..default()
-    });
 }