Drop workaround for #1314991, it doesn't work any more
    
    I rather suspect the *bug* is still basically present and it's
    why this test often fails, but we no longer seem to see the
    *error message* which lets us detect the bug happening. This
    needle has not been hit by any test for six months. So let's
    remove the workaround as it adds complexity.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>