colorstate: Drop xyz for now
Converting to and from xyz turns out to be more difficult than expected, depending on what whitepoint you choose, And different specs choose different whitepoints, so we can't directly map css xyz to cicp xyz anyway.
Converting to and from xyz turns out to be more difficult than expected, depending on what whitepoint you choose, And different specs choose different whitepoints, so we can't directly map css xyz to cicp xyz anyway.