Update app.py

app.py

@@ -30,8 +30,6 @@ import json
 from typing import TypedDict, List, Union, Any, Dict, Optional
 
 # LangChain and LangGraph imports
-from langchain.schema import HumanMessage, AIMessage, SystemMessage
-from langchain.prompts import ChatPromptTemplate
 from langgraph.graph import StateGraph, END
 from langchain_community.llms import HuggingFacePipeline 
 
@@ -59,7 +57,7 @@ from langchain_community.vectorstores import FAISS
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain_core.documents import Document
 from langchain_community.llms import HuggingFacePipeline
-from langchain.prompts import ChatPromptTemplate, SystemMessage
+from langchain.prompts import ChatPromptTemplate
 from transformers import AutoModelForCausalLM, AutoTokenizer, pipeline
 from langgraph.graph import END, StateGraph