Spurious TEXLIVE_INSTALL_NO_DISKCHECK complaint when installing TL

Hi all,

I just installed TL (install-tl-20260731), and the installer gave me the
following complaint:

    The following environment variables contain the string "tex"
    (case-independent).  If you're doing anything but adding personal
    directories to the system paths, they may well cause trouble somewhere
    while running TeX.  If you encounter problems, try unsetting them.

    Please ignore spurious matches unrelated to TeX. (To omit this check,
    set the environment variable TEXLIVE_INSTALL_ENV_NOCHECK.)

        TEXLIVE_INSTALL_NO_DISKCHECK=3D1

I ran the install in an isolated container, so I have essentially zero
environment variables set:

    $ printenv
    HOSTNAME=3D1dbe53ae2c75
    PWD=3D/root/install-tl-20260731
    container=3Doci
    HOME=3D/root
    TERM=3Dxterm
    SHLVL=3D1
    PATH=3D/usr/local/bin:/usr/bin
    _=3D/usr/bin/printenv
    OLDPWD=3D/root

So I'm pretty sure that install-tl itself set the
TEXLIVE_INSTALL_NO_DISKCHECK variable, and therefore shouldn't warn
about it.

Thanks,
-- Max