remove hr between boards and quick start

src/pages/index.astro

@@ -149,8 +149,6 @@ your code ──► client library ──┘</pre>
     </div>
   </section>
 
-  <hr class="border-border my-4" />
-
   <!-- Quick Start -->
   <section class="py-12 max-w-3xl mx-auto">
     <h2 class="font-mono text-2xl font-bold mb-6 text-text">Quick Start</h2>