Update app.py

app.py

@@ -1,14 +1,6 @@
 from pydantic import NoneStr
 import os
-from langchain.chains.question_answering import load_qa_chain
-from langchain.document_loaders import UnstructuredFileLoader
-from langchain.embeddings.openai import OpenAIEmbeddings
-from langchain.llms import OpenAI
-from langchain.text_splitter import CharacterTextSplitter
-from langchain.vectorstores import FAISS
-from pypdf import PdfReader
 import mimetypes
-import validators
 import requests
 import tempfile
 import gradio as gr