Update app.py

app.py

@@ -14,7 +14,6 @@ import torch
 from langgraph.graph import StateGraph, START, END
 from langgraph.graph.message import add_messages
 from langchain_core.messages import AnyMessage, HumanMessage, AIMessage
-from IPython.display import display, Markdown, Image
 from langchain_community.retrievers import BM25Retriever
 from langchain_core.tools import Tool
 from langchain_core.documents import Document