remove redundancy

agent.py

@@ -20,15 +20,12 @@ from langchain_community.document_loaders.parsers.audio import (
     OpenAIWhisperParserLocal,
 )
 
-#from langchain_community.document_loaders import AudioLoader, WhisperLoader
 from langchain.chat_models import init_chat_model
 from langchain.agents import initialize_agent, AgentType
 from langchain_community.retrievers import BM25Retriever
-from langchain.tools import Tool
 from langchain_core.messages import AnyMessage, SystemMessage, HumanMessage
 from langgraph.graph.message import add_messages
 from langgraph.graph import START, StateGraph
-
 from langgraph.prebuilt import ToolNode, tools_condition
 
 from youtube_transcript_api import YouTubeTranscriptApi

requirements.txt

@@ -3,12 +3,13 @@ requests
 langchain
 langchain-community
 langchain-anthropic
+langchain-core 
+langchain-huggingface
+langgraph
 smolagents
 duckduckgo-search
 wikipedia
 pytesseract
 Pillow
 pymupdf
-langgraph
-langgraph
 fire