docs: remove links section from main.go HTML response

main.go

@@ -210,10 +210,7 @@ POST /coordinate       → apply price multipliers (for coordinator)
 POST /simulate {action}→ predict next state (world model API)
 POST /reset {task_id}  → start new episode
 POST /step {action}    → take action</pre>
-<h3>📚 Links</h3>
-<ul>
-  <li><a href="https://github.com/LO-Kyu/gridmind" target="_blank" rel="noopener noreferrer">GitHub Repository</a></li>
-</ul>
+
 </body>
 </html>`
 	w.Write([]byte(html))