Update app.py

app.py

@@ -63,13 +63,6 @@ from langchain_core.prompts.chat import ChatPromptTemplate, MessagesPlaceholder
 
 #(reminder to respond in a JSON blob no matter what)'''
 
-prompt = ChatPromptTemplate.from_messages(
-    [
-        ("system", system),
-        MessagesPlaceholder("chat_history", optional=True),
-        ("human", human),
-    ]
-)
 prompt=hub.pull("hwchase17/structured-chat-agent")
 from typing import Any, Dict, List, Optional
 from langchain_core.language_models import BaseChatModel