setup.py: remove 'tag' command as version is generated from the tag, not viceversa
setup.py: remove 'tag' command as version is generated from the tag, not viceversa

greginvm/pyclipper,anthrotype/pyclipper,greginvm/pyclipper,greginvm/pyclipper,anthrotype/pyclipper,anthrotype/pyclipper