docs(headless modal): remove horrible top-layer pic

Author: maiieul

apps/website/public/images/test-image.png

@@ -2,8 +2,6 @@
 title: Qwik UI | Modal
 ---
 
-import testImage from '../../../../../public/images/test-image.png';
-
 import { statusByComponent } from '~/_state/component-statuses';
 
 <StatusBanner status={statusByComponent.headless.Modal} />
@@ -112,8 +110,6 @@ To programmatically open or close the modal, we can use `bind:show`, a signal pr
 
 ## The Top Layer
 
-<image src={testImage} class="mb-6 rounded-base" />
-
 In Chrome and Edge, a `top layer` UI button is shown in the dev tools. This means the element content is placed above any other content on the page, preventing any overflow or style issues.
 
 The top layer is used in both the **Modal** and **Popover** components of Qwik UI.