bug#57072: [BUG] update-glyphless-char-display and variation selectors

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: Axel Svensson <svenssonaxel@gmail.com>,  57072@debbugs.gnu.org
> Date: Tue, 16 Aug 2022 10:05:12 +0200
> 
>     Eli> Robert, do you remember why we included them in the script?
> 
> Hmm. Ignorance on my part seems the most likely explanation. VS1-14
> are not used for emoji/text presentation selection, so we should
> probably just fix blocks.awk

According to the comment in composite.el, we should leave only VS-16
in the 'emoji' script.

>     Eli> As for VS17 and above, I'm not sure we should assign them to any
>     Eli> script.  Perhaps to Han?
> 
> What problems are caused by them not having a script? The composition
> rules for them with Han codepoints work now, no?

Yes, because they are set up in composite.el.  So I think we are good
there.