Remove print-debug observer system

This was just so I could see two Observers executing from the same
trigger.

src/widgets.rs

@@ -123,7 +123,6 @@ fn spawn_machine_button(commands: &mut ChildSpawnerCommands) {
   builder.observe(button_hover_stop);
   builder.observe(button_press_start);
   builder.observe(button_press_stop);
-  builder.observe(second_on_press_event);
 }
 
 /// Re-color the button when a pointer passes over it
@@ -173,13 +172,3 @@ fn button_press_stop(
     *border = DARK_RED.into();
   }
 }
-
-fn second_on_press_event(
-  event: Trigger<Pointer<Pressed>>,
-  mut button_colors: Query<(&mut BackgroundColor, &mut BorderColor), With<Button>>,
-  // TODO: pull in a theme resource (also: make a theme resource)
-) {
-  if let Ok((mut bg, mut border)) = button_colors.get_mut(event.target()) {
-    dbg!("Hello, from a second Pointer<Pressed> observer!");
-  }
-}