ppt import(?) bug hunting

[Caolán McNamara]

On Sun, 2020-09-06 at 16:30 +0100, Dr. David Alan Gilbert wrote:
> So I'm now even more convinced that the right thing to do is just
> nuke these two lines

That does look convincing, that it was left over and accidentally not
updated at 8a64144fddde61dd050da4cb93b4a7242a495bb2 to the new reality

> suggest how else I should test it?

Along with your change to fix this, the ideal thing is to also add a
test to (probably) sd/qa/unit/import-tests.cxx to assert the desired
value for the numbering level