Update document_questioner_app.py

document_questioner_app.py

@@ -2,15 +2,13 @@ import openai
 import os
 import gradio as gr
 import chromadb
-from langchain.document_loaders import DirectoryLoader, TextLoader, PyPDFLoader, UnstructuredFileLoader
+from langchain.document_loaders import PyPDFLoader
 from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain.vectorstores import Chroma
 from langchain.indexes import VectorstoreIndexCreator
-from langchain.text_splitter import CharacterTextSplitter
-from langchain.chains import RetrievalQA, RetrievalQAWithSourcesChain
+from langchain.chains import RetrievalQAWithSourcesChain
 from langchain.prompts import PromptTemplate
 from langchain.chat_models import ChatOpenAI
-from langchain.chains.question_answering import load_qa_chain
 
 os.environ["OPENAI_API_KEY"] = "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"