Update main.py

main.py

@@ -7,15 +7,12 @@ from langchain.schema.runnable.config import RunnableConfig
 from langchain.embeddings import HuggingFaceEmbeddings
 from langchain.chains import ConversationalRetrievalChain
 from langchain.callbacks.streaming_stdout import StreamingStdOutCallbackHandler
-#from langchain.chains import LLMChain
 from langchain.prompts import ChatPromptTemplate, MessagesPlaceholder
 from langchain.schema import StrOutputParser
-#from langchain.chains.conversational_retrieval.prompts import CONDENSE_QUESTION_PROMPT
-#from langchain.chains.question_answering import load_qa_chain
 from langchain.chains.qa_with_sources import load_qa_with_sources_chain
 from langchain.vectorstores import Pinecone
 import pinecone
-from langchain.memory import ChatMessageHistory, ConversationBufferMemory, ConversationSummaryBufferMemory
+from langchain.memory import ChatMessageHistory, ConversationBufferMemory
 import pandas as pd
 import numpy as np
 from anthropic import Anthropic, HUMAN_PROMPT, AI_PROMPT