Update app.py

app.py

@@ -6,7 +6,6 @@ from langchain.text_splitter import CharacterTextSplitter
 from langchain.document_loaders import TextLoader
 from langchain.chains import RetrievalQA
 import os
-os.environ['HUGGINGFACEHUB_API_TOKEN'] = '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'
 llm = HuggingFaceHub(repo_id="google/flan-t5-xxl")
 embeddings = HuggingFaceEmbeddings()
 loader = TextLoader('us.txt')