CanvasTransform is far from historical

The plan in e988678 to give most things SVGMatrix (now DOMMatrix) as argument wasn't successful.

Author: annevk

source

@@ -61873,9 +61873,6 @@ try {
   objects, on objects implementing the <code>CanvasTransform</code> interface.</p>
   <!-- conformance criteria for actual drawing are described in the various sections below -->
 
-  <p class="note">Most of the API uses <code>DOMMatrix</code> objects rather than this API. This API
-  remains mostly for historical reasons.</p>
-
   <div w-nodev>
 
   <p>The transformations must be performed in reverse order.</p>