removed calls to make-local-hook in ebuff init

This post
http://lists.gnu.org/archive/html/bug-gnu-emacs/2010-10/msg00384.html
suggests that make-local-hook has been a no-op for some time. So I
just deleted two calls to it.

(this allows c-X c-B to work in emacs 24.)

(sorry about the spurious pull request, I meant to make it from this branch.)