We've already removed unsafe-references-in-binaries (which was fundamentally
broken) and nobody really cares about / and /usr being on different filesystems
anymore (at least if they, they're keeping very quiet and not fixing the bugs).
As this test was a minor detail in the scope of supporting separate / and /usr
which we don't support, it can be removed.
Signed-off-by: Ross Burton <ross.burton@intel.com>
