Can't delete file after use convert_single_pdf

[VictorBSDataAnalisis]

After using the following code:

from marker.convert import convert_single_pdf
from marker.models import load_all_models
text, images, out_meta = convert_single_pdf(filepath, load_all_models())

I can't delete the file in filepath.. I have to restart the python IDE to delete the file. I attempted to fix it putting doc.close() in convert.py and extract_text.py, but it didn't work