Remove XEmacs compat code from lisp/obsolete/*.el

Remove XEmacs compat code from lisp/obsolete/*.el

* lisp/obsolete/crisp.el (crisp-kill-region)
(crisp-region-active):
* lisp/obsolete/eudcb-ph.el (eudc-ph-open-session):
* lisp/obsolete/fast-lock.el (fast-lock-save-faces):
* lisp/obsolete/iswitchb.el (iswitchb-completion-help)
(iswitchb-case):
* lisp/obsolete/otodo-mode.el (todo-mode):
* lisp/obsolete/pgg-parse.el (pgg-parse-armor):
* lisp/obsolete/pgg.el (pgg-verify-region):
* lisp/obsolete/tpu-edt.el (activate-mark-hook, tpu-mark)
(tpu-set-mark, tpu-load-xkeys):
* lisp/obsolete/tpu-mapper.el (tpu-map-key, tpu-mapper): Remove XEmacs
compat code.