Problem deleting label

[lambertwx]

I am trying to delete a label from a dataset that has many labels. So, I tried the following

# Get it into datumaro format
python -m datumaro import -i tests/assets/cvat_dataset/for_images/train.xml -f cvat --copy -o dmu_copy --overwrite

# Remove the label1 label
python -m datumaro --loglevel debug transform -t remap_labels -p dmu_copy -o dmu_sans_label1 --overwrite  -- -l label1: --default keep

Unfortunately when I look at the resulting dmu_sans_label1/dataset/annotations/train.json, I still see that label1 is present in both the categories and in the actual annotation on img0. So no delete occurred, even though the debug output says DEBUG: #0 'label1' -> <deleted>

This occurs in the most recent version of the develop branch.

[lambertwx]

I tested. The fix works well. Thank you!