Update app.py

app.py

@@ -73,16 +73,7 @@ class KnowledgeBase:
 # ============================================
 # OPENROUTER CLIENT
 # ============================================
-class OpenRouterClient:
-    def __init__(self, api_key):
-        self.client = OpenAI(
-            base_url="https://openrouter.ai/api/v1",
-            api_key=api_key,
-            default_headers={
-                "HTTP-Referer": "https://edstellar.com",
-                "X-Title": "Edstellar Internal Linking Tool"
-            }
-        )
+undefined
     
     def get_embedding(self, text):
         """Get embedding vector"""