cssHSL.html test lists undefined as a valid input for hue

[johannesodland]

The css/css-typed-om/stylevalue-subclasses/cssHSL.html lists undefined as a valid input for hue.

However, according to the spec, h is replaced by the result of rectifying a CSSColorAngle.

This procedure throws a TypeError if h is undefined:

To rectify a CSSColorAngle val:

1. If val is a double, replace it with a new unit value from (val, "deg").
2. If val is a DOMString, replace it with the result of rectifying a keywordish value from val.
3. If val is a CSSNumericValue, and it matches , return val.
4. If val is a CSSKeywordValue, and its value internal slot is an ASCII case-insensitive match for "none", return val.
5. Throw a TypeError.

Additionally, neither Chrome nor Edge supports undefined.
https://wpt.fyi/results/css/css-typed-om/stylevalue-subclasses/cssHSL.html?label=experimental&label=master&aligned

Should perhaps undefined be removed from the list of valid inputs for h?