Update app.py

app.py

@@ -19,7 +19,7 @@ from langchain.document_loaders.blob_loaders.youtube_audio import YoutubeAudioLo
 from langchain.document_loaders.generic import GenericLoader
 from langchain.document_loaders.parsers import OpenAIWhisperParser
 from langchain.schema import AIMessage, HumanMessage
-from langchain.llms import HuggingFaceHub, HuggingFaceChain
+from langchain.llms import HuggingFaceHub
 from langchain.llms import HuggingFaceTextGenInference
 from langchain.embeddings import HuggingFaceInstructEmbeddings, HuggingFaceEmbeddings, HuggingFaceBgeEmbeddings, HuggingFaceInferenceAPIEmbeddings
 from langchain.retrievers.tavily_search_api import TavilySearchAPIRetriever