don't use padding for layout (#14944)

# Objective

- Fixes #14792 
- Padding is already handled by taffy, don't handle it also on Bevy side

## Solution

- Remove extra computation added in
#14777

crates/bevy_ui/src/layout/mod.rs

@@ -264,16 +264,10 @@ pub fn ui_layout_system(
  let Ok(layout) = ui_surface.get_layout(entity) else {
  return;
  };
- let layout_size = inverse_target_scale_factor
- * Vec2::new(
- layout.size.width - layout.padding.left - layout.padding.right,
- layout.size.height - layout.padding.top - layout.padding.bottom,
- );
- let layout_location = inverse_target_scale_factor
- * Vec2::new(
- layout.location.x + layout.padding.left,
- layout.location.y + layout.padding.top,
- );
+ let layout_size =
+ inverse_target_scale_factor * Vec2::new(layout.size.width, layout.size.height);
+ let layout_location =
+ inverse_target_scale_factor * Vec2::new(layout.location.x, layout.location.y);
 
  absolute_location += layout_location;