Drop most package removals / additions from the kickstart file and rely
on the @workstation-product comps group pulling in the correct packages.
We'll need package selection done in comps in order to make Workstation
netinstall work properly.
https://bugzilla.redhat.com/show_bug.cgi?id=1134524
icedtea-web clutters the application view with two launchers for config
dialogs which are not really apps as we define the term.
It used to be excluded previously but accidentally slipped back in with
the live-desktop -> live-workstation kickstart renames; this commit
takes it out again.
https://bugzilla.redhat.com/show_bug.cgi?id=1131248
