bug#73257: 31.0.50; Deleting obsolete libraries in Emacs 31

[Stefan Kangas <stefankangas@gmail.com>]

Severity: wishlist

We usually delete libraries obsoleted 10 years ago at the time of a new
Emacs release.  This should mean that anything made obsolete before
24.5, released on 2015-04-10, are candidates for deletion in Emacs 31.

This is the full list of such libraries:

    24.1 lisp/obsolete/pgg-def.el
    24.1 lisp/obsolete/pgg-gpg.el
    24.1 lisp/obsolete/pgg-parse.el
    24.1 lisp/obsolete/pgg-pgp.el
    24.1 lisp/obsolete/pgg-pgp5.el
    24.1 lisp/obsolete/pgg.el
    24.3 lisp/obsolete/bruce.el
    24.4 lisp/obsolete/info-edit.el
    24.4 lisp/obsolete/iswitchb.el
    24.4 lisp/obsolete/longlines.el
    24.4 lisp/obsolete/meese.el
    24.4 lisp/obsolete/otodo-mode.el
    24.4 lisp/obsolete/rcompile.el
    24.4 lisp/obsolete/sup-mouse.el
    24.4 lisp/obsolete/terminal.el
    24.4 lisp/obsolete/yow.el
    24.5 lisp/obsolete/cc-compat.el
    24.5 lisp/obsolete/crisp.el
    24.5 lisp/obsolete/tpu-edt.el
    24.5 lisp/obsolete/tpu-extras.el
    24.5 lisp/obsolete/tpu-mapper.el
    24.5 lisp/obsolete/vi.el
    24.5 lisp/obsolete/vip.el
    24.5 lisp/obsolete/ws-mode.el

1. We cannot yet remove iswitchb.el, as isearchb.el depends on it (see
   Bug#36260).

2. We also cannot remove longlines.el, as so-long.el depends on it, and
   even recommends it in certain cases.

3. ISTR that Eli objected to removing bruce.el in Emacs 30, so I'm
   assuming this objection this still stands.

Are there any other blockers or considerations?