refactor: remove unused imports from various modules

Author: MinecraftFuns

python/langchain/promptpipe_agent/agents/coordinator_agent.py

@@ -4,7 +4,6 @@
 from typing import Optional
 
 from langchain_core.messages import HumanMessage, SystemMessage
-from langchain_core.tools import tool
 from langchain_openai import ChatOpenAI
 
 from promptpipe_agent.config import settings

python/langchain/promptpipe_agent/tools/prompt_generator_tool.py

@@ -90,7 +90,7 @@ def _run(self, participant_id: str) -> str:
 
             return generated_prompt
 
-        except Exception as e:
+        except Exception:
             # Fallback to default prompt on error
             return (
                 "If your phone buzzes, take 50 steps, either walking around or walking in place. "

python/langchain/promptpipe_agent/tools/state_transition_tool.py

@@ -1,6 +1,5 @@
 """State transition tool for conversation flow."""
 
-from typing import Any
 
 from langchain.tools import BaseTool
 from pydantic import BaseModel, Field

python/langchain/tests/unit/test_models.py

@@ -2,7 +2,6 @@
 
 from datetime import datetime
 
-import pytest
 
 from promptpipe_agent.models.schemas import (
     ConversationHistory,