[OctDev] no more combinatorics and physical-constants package

[Carnë D. <car...@gm...>]

Hi everyone

I have removed the combinatorics and physical-constants packages.

They had been moved into the miscellaneous package some months ago and
since a new release of it was made, I have also released these two as
well. They are empty packages, only have a dummy file and are
dependent on the new version of miscellaneous just to ease transition.

Carnë