Update app.py

app.py

@@ -1,4 +1,3 @@
-from dotenv import load_dotenv
 import streamlit as st
 import os
 from PyPDF2 import PdfReader
@@ -6,9 +5,7 @@ from langchain.text_splitter import CharacterTextSplitter
 from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain.vectorstores import FAISS
 from langchain.chains.question_answering import load_qa_chain
-from langchain.llms import OpenAI
 from langchain.callbacks import get_openai_callback
-from langchain.embeddings import HuggingFaceEmbeddings
 from langchain import HuggingFaceHub, LLMChain
 from langchain.embeddings import HuggingFaceHubEmbeddings
 token = os.environ['HF_TOKEN']