[PATCH] doc/ctf-spec.texi: Remove "@validatemenus off"

[Nick Alcock]

On 10 Nov 2021, H. J. Lu stated:

> On Tue, Nov 9, 2021 at 3:51 PM Nick Alcock <nick.alcock@oracle.com> wrote:
>> But it looks like we'll at least need to bump the texinfo requirement
>> for ctf-spec.texi generation further, until some version that generates
>> menus even in the absence of @validatemenus. The total lack of menution
>> of all the refactorings in this area (or even the removal of
>> @validatemenus) in the NEWS makes it quite hard to tell what version
>> that might be... given that this is only a specfile it's probably
>> acceptable to go all the way to 6.8 (iff I find that works).
>
> You can check with and without "@validatemenus off" using an older
> textinfo.

It seems to autogenerate menus fine all the way back to 6.3. I guess
@validatemenus off was completely unnecessary after all and I don't need
to change the minimum Texinfo version in libctf/configure.ac either :)
so thanks for removing it!