Intent to unship: SVGAElement.prototype.text

[Robert Longson]

Summary: Neither Chrome, nor Safari have ever implemented the text method on the SVGAElement interface and you can just use SVGAElement.textContent instead.

Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1880689

Specification: https://www.w3.org/TR/SVG2/linking.html#InterfaceSVGAElement

Standards body: w3c

Preference: svg.SVGAElement.text.enabled will be set to false

Link to standards-positions discussion: https://github.com/w3c/svgwg/issues/931