Update app.py

app.py

@@ -162,9 +162,9 @@ print('qa chain and vector_db done')
 
 def demo():
     with gr.Blocks(theme='base') as demo:
-        vector_db = gr.State()
+        #vector_db = gr.State()
         #qa_chain = gr.State()
-        collection_name = gr.State()
+        #collection_name = gr.State()
         
         chatbot = gr.Chatbot(height=300)
         with gr.Accordion('References', open=True):