meta-ibm: remove ibm-dbus-interfaces

The content in this repository has been moved to
phosphor-dbus-interfaces, and ibm-dbus-interfaces has been deprecated.
Remove the recipe.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Change-Id: I36edf4743ed6a79c610a78eab84926de1d681818