[LyX/master] Rest in peace, dvipost!

[Pavel Sanda]

On Mon, Jan 13, 2020 at 08:42:44AM +0100, Juergen Spitzmueller wrote:
> commit a450797b2ab160f5953922d59298e6ff6472f8e4
> Author: Juergen Spitzmueller <spitz at lyx.org>
> Date:   Mon Jan 13 08:59:26 2020 +0100
> 
>     Rest in peace, dvipost!
> ---
> -\TestPackage{dvipost}
> -    path, PPLATEX = checkProg('a DVI postprocessing program', ['pplatex $$i'])

We should probably signalize through RELEASE-NOTES to packagers that dependency
on pplatex/dvipost is gone (as I understand we needed it only for CT).

Pavel