Update app.py

app.py

@@ -1,7 +1,7 @@
 import base64
 import os
-from dotenv import load_dotenv
-import openai
+
+
 from langchain.embeddings.openai import OpenAIEmbeddings
 import streamlit as st
 from langchain.chains import RetrievalQA
@@ -15,7 +15,7 @@ from transformers import AutoModelForSeq2SeqLM, AutoTokenizer, pipeline
 import torch
 
 st.set_page_config(layout="wide")
-load_dotenv()
+
 
 def process_answer(instruction, qa_chain):
     response = ''
@@ -105,7 +105,7 @@ def display_conversation(history):
 
 def main():
      # Add a sidebar for model selection
-    model_options = [ "meta-llama/Llama-2-13b-chat-hf","MBZUAI/LaMini-T5-738M", "google/flan-t5-base", "google/flan-t5-small"]
+    model_options = ["MBZUAI/LaMini-T5-738M", "google/flan-t5-base", "google/flan-t5-small"]
     selected_model = st.sidebar.selectbox("Select Model", model_options)
     
     st.markdown("<h1 style='text-align: center; color: blue;'>Custom PDF Chatbot 🦜📄 </h1>", unsafe_allow_html=True)