Remove duplicate versions, to fix appdata validation failures

Breaks the Flatpak build currently.
2 jobs for master in 41 minutes and 17 seconds (queued for 26 minutes and 34 seconds)
Status Job ID Name Coverage
  Build
passed #66349
build_clazy_clang_tidy

00:26:52

passed #66348
linux kf5-qt5 qt5.12

00:14:25

0.0%