Face detection using a cascade classifier no longer works

# Load the trained file from the module root.
trained_file = data.lbp_frontal_face_cascade_filename()

the data object no longer contains lbp_frontal_face_cascade_filename()


# Initialize the detector cascade.
detector = Cascade(trained_file)

skimage.feature no longer contains  Cascade function.

This example needs to be rewritten.