Re: How is the 21.2.90 pretest going?

[Richard Stallman]

    > In those file I can read a comment like this:
    >  ;;; Note this definition must be at the end of the file, because
    >  ;;; `define-minor-mode' actually calls the mode-function if the
    >  ;;; associated variable is non-nil, which requires that all needed
    >  ;;; functions be already defined.  [This is arguably a bug in d-m-m]
    >  ;;;###autoload
    >  (define-minor-mode auto-image-file-mode

    These comments have been obsolete since Emacs-21.1.

I thought we decided define-minor-mode should still do this.
What makes the comments obsolete?