[pkginfo] Remove unused parameter To retrieve cube dependencies or cube requirements, no more need to pass the 'oldkey' parameter to _cube_deps function as this parameter is unused.

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