Remove local recipe for busybox-1.7.2. The Angstrom distro config file sets PREFERRED_VERSION_busybox = 1.9.1, so this recipe is therefore not even used. The base-image and wireless-image recipes both still work after removing this recipe and files.
(Of course, this rev, or pieces of it, can be reverted if we do need any of the files. syslog.conf, in particular, may turn out to be useful.)