Usage of deprecated attribute "intrinsicsize" for images

The attribute "intrinsicsize" seems to be deprecated, see e.g. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img
And the HTML validator says:

`Error: Attribute intrinsicsize not allowed on element img at this point.`

Also, when I fully understand the functionality of "intrinsicsize", it shouldn't contain the same values than the "width" and "height" attribute. The attribute "intrinsicsize" only makes sense when setting different image dimensions.

I think you can remove this attribute without substitution.