Remove most of the XEmacs compat code from viper*.el

Remove most of the XEmacs compat code from viper*.el

* lisp/emulation/viper-cmd.el ()
(viper-insert-state-post-command-sentinel)
(viper-change-state-to-vi, viper-change-state-to-insert)
(viper-change-state-to-emacs, viper-escape-to-state)
(viper-special-read-and-insert-char, viper-toggle-key-action)
(viper-prefix-arg-value, viper-prefix-arg-com)
(viper-digit-argument, viper-command-argument, )
(viper-exec-Yank, viper-repeat, viper-forward-char)
(viper-backward-char, viper-forward-word, viper-forward-Word)
(viper-end-of-word, viper-end-of-Word, viper-backward-word)
(viper-backward-Word, viper-beginning-of-line)
(viper-bol-and-skip-white, viper-goto-eol, viper-goto-col)
(viper-next-line, viper-next-line-at-bol, viper-previous-line)
(viper-previous-line-at-bol, viper-goto-line, )
(viper-repeat-find, viper-repeat-find-opposite)
(viper-window-top, viper-window-middle, viper-window-bottom)
(viper-paren-match, viper-search, viper-buffer-search-enable)
(viper-put-back, viper-Put-back, viper-mark-point)
(viper-cycle-through-mark-ring, viper-goto-mark-subr)
(viper-brac-function, viper-register-to-point)
(viper-submit-report): Remove some XEmacs compat code.

* lisp/emulation/viper-ex.el (viper-get-ex-address-subr)
(viper-handle-!, ex-edit, ex-mark, ex-next-related-buffer)
(ex-help, ex-write, ex-write-info, viper-info-on-file): Ditto.

* lisp/emulation/viper-keym.el (viper-add-keymap): Ditto.

* lisp/emulation/viper-macs.el (viper-record-kbd-macro): Remove
XEmacs compat code.

* lisp/emulation/viper-mous.el (viper-mouse-click-insert-word)
(viper-mouse-click-search-word): Remove some XEmacs compat code.

* lisp/emulation/viper-util.el (viper-overlay-p)
(viper-color-defined-p, viper-iconify, viper-memq-char)
(viper-char-equal, viper=, viper-color-display-p)
(viper-get-cursor-color, viper-frame-value)
(viper-change-cursor-color, viper-save-cursor-color)
(viper-restore-cursor-color, viper-get-visible-buffer-window)
(viper-file-checked-in-p, viper-put-on-search-overlay)
(viper-flash-search-pattern, viper-hide-search-overlay)
(viper-move-replace-overlay, viper-set-replace-overlay)
(viper-set-replace-overlay-glyphs, viper-hide-replace-overlay)
(viper-replace-start, viper-replace-end)
(viper-set-minibuffer-overlay, viper-check-minibuffer-overlay)
(viper-abbreviate-file-name, viper-mark-marker)
(viper-set-mark-if-necessary, viper-leave-region-active)
(viper-copy-event, viper-read-event-convert-to-char)
(viper-event-key, viper-last-command-char)
(viper-key-to-emacs-key, viper-eventify-list-xemacs)
(viper-set-unread-command-events, viper-char-array-p)
(viper-key-press-events-to-chars, viper-read-char-exclusive):
Remove most of the XEmacs compat code.

* lisp/emulation/viper.el (viper-go-away, viper-set-hooks)
(viper-non-hook-settings): Remove some XEmacs compat code.