Clean up commented API key line

Removed commented hardcoded API key reference for cleaner code.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app.py

@@ -218,7 +218,7 @@ def classify_query(prompt: str) -> str:
 def search_brave(query: str, max_results: int = 5) -> List[Dict[str, Any]]:
     """Search using Brave Search API"""
     try:
-        api_key = os.getenv('BRAVE_API_KEY') #or 'BSAaiYwrOKAj6njwCZ5IZVaJBfvCVNL'
+        api_key = os.getenv('BRAVE_API_KEY')
         if not api_key:
             logger.error("BRAVE_API_KEY environment variable not set")
             return []