How to delete .*.~undo-tree~ files?

[Denis Bitouzé <dbitouze@xxxxxxxxxx>]

Hi,

I'm able to delete a given .~undo-tree~ file (created by an Emacs
package):

  ┌────
  │ rm -f .foo.\~undo-tree\~
  └────

But I couldn't find a way to delete in one go all of the them in the
current directory (even more so in subdirectories) .

Thanks for any hint.
-- 
Denis