[dataimport] remove replace_sep parameter from massive store It is unused since changeset efbbf1e93a04 "[dataimport] Properly escape strings sent to COPY FROM"

version=3
opts=uversionmangle=s/(rc|a|b|c)/~$1/ \
http://pypi.debian.net/cubicweb/cubicweb-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))