fix(lint): remove unused model variable and get_setting import in chat.py

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/fabledassistant/services/chat.py

@@ -9,7 +9,6 @@ from fabledassistant.models.conversation import Conversation, Message
 from fabledassistant.config import Config
 from fabledassistant.services.llm import generate_completion
 from fabledassistant.services.notes import create_note
-from fabledassistant.services.settings import get_setting
 
 logger = logging.getLogger(__name__)
 
@@ -223,9 +222,6 @@ async def save_response_as_note(user_id: int, message_id: int) -> dict:
     # Generate title via LLM using the assistant message content
     title = ""
     if conv:
-        model = conv.model or await get_setting(
-            user_id, "default_model", Config.OLLAMA_MODEL
-        )
         try:
             prompt_messages = [
                 {