Update chain.py

chain.py

@@ -47,7 +47,7 @@ def get_chain(retriever):
     chain = RetrievalQA.from_chain_type(
         llm=chat, 
         chain_type="stuff", 
-        retriever=retriever, 
+        # retriever=retriever, 
         memory=memory, 
         chain_type_kwargs={"prompt": prompt}
     )