kalzium installs /usr/share/kalzium/qml/detailview.qml which hasn't been touched in git since 2011 and starts with import qt 4. if it's used I feel like something is wrong, if it's unused it shouldn't get installed
https://commits.kde.org/kalzium/61cf33bbde4efa14e2d5081c75a8d880c35eec05