app-emacs/md5 and app-emacs/sha1 are no longer needed as separate packages. md5: md5 is a built-in function in Emacs 21.4 and later, also comes with FLIM and Gnus. sha1: Comes with FLIM and Gnus, and is also included in Emacs 22.1 and later (via Gnus).
Both removed.