[dataimport] remove replace_sep parameter from massive store
It is unused since changeset efbbf1e93a04 "[dataimport] Properly escape
strings sent to COPY FROM"
ifnotrql('CWConstraintType X WHERE X name "RQLUniqueConstraint"',ask_confirm=False):rql('INSERT CWConstraintType X: X name "RQLUniqueConstraint"',ask_confirm=False)