Update app.py

app.py

@@ -7,7 +7,6 @@ from langchain.embeddings import HuggingFaceEmbeddings
 from openai import OpenAI
 from langchain_openai import ChatOpenAI
 from typing import List, Dict
-import fitz  # PyMuPDF
 from langchain.schema import Document
 from langchain_experimental.text_splitter import SemanticChunker # module for chunking text
 import os