Revert "Don't disable eldoc when doing edebug"

This reverts commit 6fd1fb8a68.
It turns out ElDoc does show messages inside Edebug, if you
are (un)lucky enough to have point where ElDoc has something
to show.  Bug#56459 needs to be fixed in some more complex
way.

lisp/emacs-lisp/eldoc.el

@@ -388,6 +388,7 @@ Also store it in `eldoc-last-message' and return that value."
 (defun eldoc-display-message-no-interference-p ()
   "Return nil if displaying a message would cause interference."
   (not (or executing-kbd-macro
+           (bound-and-true-p edebug-active)
            ;; The following configuration shows "Matches..." in the
            ;; echo area when point is after a closing bracket, which
            ;; conflicts with eldoc.