Update app.py

app.py

@@ -1,6 +1,5 @@
 import streamlit as st
-from langchain_community.llms import HuggingFaceHub  # Updated import
-from langchain.chains import ConversationChain
+from langchain.llms import HuggingFaceHub  
 from langchain.memory import ConversationBufferMemory
 import os
 from datetime import datetime, timedelta