[schema2sql] Drop most of the DB DROP related code This code is dead for a while, it has been superseded by `sql_drop_all_user_tables`. Related to #14050899

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