Get rid of INSTALL.MacOSX?

[Pavel Sanda]

On Sun, Jul 21, 2024 at 12:42:59AM +0200, Jean-Marc Lasgouttes wrote:
> The last remaining bit of TODO.killqt4 is INSTALL.MacOSX. I thought we
> wanted to update it, but I fail to see what should be kept in this file as
> it is.
> 
> Stephan, do we have a reason to keep it?
> 
> Later, you could create a new INSTALL.macOS with up-to-date information if
> you feel that the file is needed.

Hi Stephan, gentle reminder, if we can finally say good bye to Qt4 remmnants 
in the master tree :)

Pavel