Drop PIM from the iso (default install)

[Jonathan Riddell]

> 5) KDE neon don't install it by default - The official KDE distribution
> don't install it by default.  Probably due to the resource hogging as
> described above.

There's no official KDE distro and KDE neon certainly isn't it.  It's
just a project some of us had an idea for and looking for a place to
home it KDE was the obvious fit.

Jonathan