Update app.py

app.py

@@ -71,9 +71,7 @@ load_env_file()
 '''
 # HF Spaces: load API keys from Secrets only
 OPENROUTER_API_KEY = os.getenv("OPENROUTER_API_KEY")
-OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
-
-if not OPENROUTER_API_KEY and not OPENAI_API_KEY:
+if not OPENROUTER_API_KEY:
     print("WARNING: No API key found. Add one in Settings → Secrets.")
 
 MAX_CONTEXT_FILE_SIZE = 2 * 1024 * 1024  # 2 MB