Update app3.py

app3.py

@@ -13,23 +13,6 @@ import time
 import groq
 import uuid  # For generating unique filenames
 
-# OLD Updated imports to address LangChain deprecation warnings:
-#from langchain_groq import ChatGroq
-#*from langchain.schema import HumanMessage
-#from langchain_core.messages import HumanMessage
-#*from langchain_text_splitters import RecursiveCharacterTextSplitter
-#try:
-    # For newer versions
-#    from langchain_text_splitters import RecursiveCharacterTextSplitter
-#except ImportError:
-    # For older versions
-#    from langchain.text_splitter import RecursiveCharacterTextSplitter
-#from langchain_community.vectorstores import Chroma
-#from langchain_community.embeddings import HuggingFaceEmbeddings
-#*from langchain.docstore.document import Document
-#from langchain_core.documents import Document
-#from langchain.chains import RetrievalQA  # This one might still be in main langchain
-
 
 # NEW IMPORTS (current):
 from langchain_core.messages import HumanMessage, SystemMessage, AIMessage