bug#34663: remove ftx font backend

[Stefan Kangas]

Eli Zaretskii <eliz@gnu.org> writes:

> > Now that the emacs-27 branch is cut, perhaps it is time to consider
> > applying this to master?  I have attached a rebased patch.
>
> Yes, but:
>
>   . please add a NEWS entry about ftx's removal (in the "Installation
>     Changes" section)
>   . please add a NEWS entry on the emacs-27 branch saying that this
>     font backend is deprecated and will be removed

Thanks.  Things are a bit busy currently but I hope to find some time
in the next week or two.

Best regards,
Stefan Kangas