MarsSeed [1] filed a deletion request for pyside2-tools-git [2]: Broken, EOL Qt5 based Python tools; currently linked upstream repo no longer exists (404).
Useless to keep this package. Extra repo still carries the stable pyside2-tools (whose upstream is in minimal maintenance mode). [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/pyside2-tools-git/
