Follow CR-html5-20140429.

Now interactive elements are omitted from HTML5 and postponed to HTML
5.1. Stay tuned.

See also: http://www.w3.org/TR/2014/CR-html5-20140429/

Signed-off-by: OGINO Masanori <masanori.ogino@gmail.com>

test/test.css

@@ -602,9 +602,6 @@ keygen,
 output,
 progress,
 meter,
-details,
-summary,
-dialog,
 template,
 canvas {
   display: auto;