Get rid of ancient compatibility and small utility file.
* sml-proc.el (inferior-sml-mode-map): Don't use defmap.
* sml-move.el (sml-internal-syntax-table): Don't use defsyntax.
* sml-mode.el (sml-syntax-prop-table): Don't use defsyntax.
(sml-electric-space): `last-command-char' -> `last-command-event'.
(sml-defuse-jump-to-def): Don't use goto-line from Elisp.
* sml-defs.el (sml-mode-map): Don't use defmap.
(sml-mode-syntax-table): Don't use defsyntax.
(sml-preproc-alist, sml-builtin-nested-comments-flag):
Move from sml-util.el.
* sml-compat.el, sml-utils.el: Remove.
* makefile.pkg (ELFILES): Update.