Fails to build with Qt6 currently but for now I just want to get the
build queue through and the builders clear

Temporary till the build queue has gone through, then I can investigate
why the repo has kitemmodels 6.0.0 rather than 5.115.0

For some reason the dep can't be found even though it's installed.
Remove the dep for now so we can figure out what's happening later

It currently seems to require OpenGL, but qt6-qtbase on aarch64 is built
for OpenGLES. This will need looking into but for now we just want to
get the build queue through

testing/nm-tray depends on it

Several non-KDE packages also depend on this