Stop exporting redundant env vars
These are already set in the launch script https://invent.kde.org/plasma/plasma-bigscreen/-/blob/master/bin/plasma-bigscreen-wayland.in
I'm also wondering about the need for etc/profile.d/enforce-qtvirtualkeyboard.sh
. This file is not present on my system and QtVirtualKeyboard already launches anyway, and works as expected. Is this different on X11?