[whatwg] WebApps spec, chapter 7.1.1.9 "Images"

[Jens Bannmann]

The note at the end of chapter 7.1.1.9 saying "All canvases implement 
HTMLImageElement, so canvas elements can be passed to the drawImage 
methods" looks like it's superfluous, now that HTMLCanvasElement no 
longer inherits from HTMLImageElement. The rest of the spec, e.g. the 
second paragraph of that chapter, was already changed accordingly.

Best regards,
Jens