Update app.py

app.py

@@ -1,5 +1,4 @@
 import streamlit as st 
-from langchain_community.llms import HuggingFaceTextGenInference
 import os
 from langchain.callbacks.streaming_stdout import StreamingStdOutCallbackHandler
 from langchain.schema import StrOutputParser
@@ -14,7 +13,6 @@ from langchain.prompts import ChatPromptTemplate, MessagesPlaceholder
 from langchain_core.chat_history import BaseChatMessageHistory
 from langchain.memory import ConversationBufferMemory#, PostgresChatMessageHistory
 
-import psycopg2
 import urllib.parse as up
 
 # os.environ['LANGCHAIN_TRACING_V2'] = "true"