remove gemini model

agent/nodes.py

@@ -7,7 +7,7 @@ from langchain_core.messages import SystemMessage, HumanMessage
 from tavily import TavilyClient
 from agent.custom_state import AssistantState
 import os
-from agent.models import openai_model, gemini_model, llama_client, openai_audio_model
+from agent.models import openai_model, openai_audio_model
 from dotenv import load_dotenv
 from e2b_code_interpreter import Sandbox
 from agent.utils import load_data, extract_python