fix: remove unused import of ModelPath in vlm_analyze.py

mineru/backend/vlm/vlm_analyze.py

@@ -8,7 +8,6 @@ from mineru.utils.pdf_image_tools import load_images_from_pdf
 from .base_predictor import BasePredictor
 from .predictor import get_predictor
 from .token_to_middle_json import result_to_middle_json
-from ...utils.enum_class import ModelPath
 from ...utils.models_download_utils import auto_download_and_get_model_root_path