Remove many items obsolete since Emacs 22.1

Remove many items obsolete since Emacs 22.1

Emacs 22.1 was five major releases and over decade ago.
In bug reporting statistics, it's been absent for around 5 years.
Ref: https://debbugs.gnu.org/stats/emacs.html
This list can be reviewed before to the next release, but for
now hopefully this motivates any needed external updates.
* lisp/arc-mode.el (archive-mouse-extract):
* lisp/bookmark.el (bookmark-exit-hooks):
* lisp/comint.el (comint-use-prompt-regexp-instead-of-fields):
* lisp/cus-edit.el (custom-face-save-command):
* lisp/descr-text.el (describe-char-after):
* lisp/desktop.el (desktop-enable, desktop-basefilename)
(desktop-buffer-modes-to-save, desktop-buffer-misc-functions)
(desktop-buffer-handlers, desktop-load-default):
* lisp/dired-x.el (dired-omit-files-p):
* lisp/frame.el (new-frame, set-default-font, delete-frame-hook)
(blink-cursor):
* lisp/generic-x.el (generic-define-mswindows-modes)
(generic-define-unix-modes):
* lisp/help.el (describe-project, view-todo):
* lisp/hilit-chg.el (highlight-changes-colours):
* lisp/ibuffer.el (ibuffer-elide-long-columns, ibuffer-hooks)
(ibuffer-mode-hooks):
* lisp/imenu.el (imenu-always-use-completion-buffer-p):
* lisp/isearch.el (isearch-lazy-highlight-cleanup)
(isearch-lazy-highlight-initial-delay)
(isearch-lazy-highlight-interval)
(isearch-lazy-highlight-max-at-a-time)
(isearch-lazy-highlight-cleanup):
* lisp/mwheel.el (mouse-wheel-down-button)
(mouse-wheel-up-button, mouse-wheel-click-button):
* lisp/novice.el (disabled-command-hook):
* lisp/recentf.el (recentf-menu-append-commands-p):
* lisp/savehist.el (savehist-load):
* lisp/speedbar.el (speedbar-ignored-path-expressions)
(speedbar-ignored-path-regexp, speedbar-add-ignored-path-regexp)
(speedbar-line-path, speedbar-buffers-line-path, speedbar-path-line):
* lisp/subr.el (assoc-ignore-case, assoc-ignore-representation)
(x-lost-selection-hooks, x-sent-selection-hooks)
(process-kill-without-query):
* lisp/calendar/icalendar.el (icalendar-convert-diary-to-ical)
(icalendar-extract-ical-from-buffer):
* lisp/emacs-lisp/autoload.el (update-autoloads-from-directories):
* lisp/emacs-lisp/derived.el (derived-mode-class):
* lisp/emacs-lisp/generic.el (generic-font-lock-defaults):
* lisp/emacs-lisp/timer.el (timer-set-time-with-usecs):
* lisp/gnus/spam.el (spam-list-of-processors):
* lisp/international/latin1-disp.el (latin1-char-displayable-p):
* lisp/mail/rmail.el (rmail-pop-password, rmail-pop-password-required):
* lisp/net/goto-addr.el (goto-address-at-mouse):
* lisp/net/net-utils.el (ipconfig-program, ipconfig-program-options):
* lisp/obsolete/iswitchb.el (iswitchb-use-fonts):
* lisp/play/dunnet.el (dungeon-mode-map):
* lisp/progmodes/compile.el (compilation-finish-function)
* lisp/progmodes/cperl-mode.el (cperl-vc-header-alist)
* lisp/progmodes/gud.el (tooltip-gud-modes, tooltip-gud-display)
(tooltip-gud-toggle-dereference):
* lisp/progmodes/pascal.el (pascal-outline):
* lisp/progmodes/perl-mode.el (electric-perl-terminator):
* lisp/textmodes/nroff-mode.el (count-text-lines)
(forward-text-line, backward-text-line, electric-nroff-newline)
(electric-nroff-mode):
* lisp/vc/log-edit.el (vc-comment-ring, vc-comment-ring-index)
(vc-previous-comment, vc-next-comment)
(vc-comment-search-reverse, vc-comment-search-forward)
(vc-comment-to-change-log):
* lisp/vc/pcvs-info.el (cvs-display-full-path)
(cvs-fileinfo->full-path):
* lisp/vc/vc.el (vc-diff-switches-list):
Remove items, obsolete since Emacs 22.1.
* lisp/ibuffer.el (ibuffer-cached-elide-long-columns):
Remove internal variable.
(ibuffer-compile-make-eliding-form, ibuffer-check-formats):
(ibuffer-mode): Remove support for ibuffer-elide-long-columns.
* lisp/cedet/semantic/sb.el (semantic-sb-token-jump):
Remove support for speedbar-line-path.
* lisp/emacs-lisp/unsafep.el (assoc-ignore-case):
Stop marking as side-effect-free.
* lisp/gnus/spam.el (spam-group-processor-p):
Remove support for spam-list-of-processors.
* lisp/progmodes/compile.el (define-compilation-mode)
(compilation-handle-exit):
Remove support for compilation-finish-function.
* lisp/progmodes/cperl-mode.el (cperl-mode):
Remove support for cperl-vc-header-alist.
; * lisp/files.el: Comments.
; * etc/NEWS: List removed items.