remove (lang elisp), as it won't work with the new evaluator

remove (lang elisp), as it won't work with the new evaluator

* lang/: Delete. This causes me some pain, but the new elisp compiler is
  coming soon, and the old one really won't work with the new evaluator.
* Makefile.am:
* configure.ac: Autotoolery for elisp removal.
* test-suite/tests/elisp.test: Comment out the body of the elisp test.
  The tests themselves should be useful in the new world, though.