bug#71754: 30.0.60; Reference to deleted variable `utf-fragment-on-decoding' in cyrillic.el

[Eli Zaretskii]

> From: Stefan Kangas <stefankangas@gmail.com>
> Date: Mon, 24 Jun 2024 11:04:54 -0700
> 
> Severity: minor
> 
> In lisp/languages/cyrillic.el, there is a reference to the seemingly
> removed user option `utf-fragment-on-decoding':
> 
>     ;; Customizing `utf-fragment-on-decoding' allows decoding characters
>     ;; from KOI and Alternativnyj into 8859-5 where that's possible.
>     ;; cyrillic-iso8859-5 characters take half as much space in the buffer
>     ;; as the mule-unicode-0100-24ff equivalents, though that's probably
>     ;; not normally a big deal.
> 
> I don't know if this should be updated or deleted.

It's been obsolete since Emacs 23.  I deleted it.