Update app.py

app.py

@@ -4,9 +4,6 @@ from tempfile import NamedTemporaryFile
 from langchain.document_loaders import PyPDFLoader
 from langchain.embeddings import HuggingFaceEmbeddings
 from langchain.vectorstores import Chroma
-from langchain.llms import GPT4All
-from langchain.chains.question_answering import load_qa_chain
-from langchain import PromptTemplate, LLMChain
 from transformers import AutoModelForQuestionAnswering, AutoTokenizer, pipeline
 
 # Function to save the uploaded PDF to a temporary file