[integration] Remove SVG in foreignObject section

As discussed on the meeting
(https://www.w3.org/2016/02/05-svg-minutes.html) there is nothing
special about sizing or presenting SVG in foreignObject context and we
already specify the relationship between CSS containing block and SVG
viewport in https://svgwg.org/svg2-draft/coords.html#ViewportSpace.

This resolves the issue #10 as well

specs/integration/master/Overview.html

@@ -854,10 +854,6 @@ <h3 id="foreign-content-html">Using HTML in <span class='element-name'>'foreignO
 <p class="issue" data-issue="9">Add examples of HTML in foreignObject, by reference
 and inline.</p>
 
-<h3 id="foreign-content-svg">Using SVG in <span class='element-name'>'foreignObject'</span></h3>
-
-<p class='issue' data-issue="10">TODO</p>
-
 <!--
 <h2 id="extend">Extending SVG</h2>