Update app.py

app.py

@@ -5,7 +5,7 @@ from crew import get_crew
 
 LLM = "gpt-3.5-turbo"
 
-def invoke(openai_api_key, serper_api_key, topic):
+def invoke(openai_api_key, topic):
     if (openai_api_key == ""):
         raise gr.Error("OpenAI API Key is required.")
     if (topic == ""):