Update app.py

app.py

@@ -7,7 +7,6 @@ from note_engine import note_engine
 from llama_index.core.tools import QueryEngineTool, ToolMetadata
 from llama_index.core.agent import ReActAgent
 from llama_index.llms.openai import OpenAI
-from langchain_core.language_models.cache import BaseCache
 from data_summary import data_summary_tool
 from pdf import bangladesh_engine
 from dotenv import load_dotenv