HFP-2137 Stop setting height to auto on embed

Content hosted on moodle will not scale to full height when
embedded in moodle. Removing this line doesn't seem to
influence emdedding this content elsewhere or using content
directly.

embed.js

@@ -89,9 +89,6 @@ document.onreadystatechange = function () {
         // Initial setup/handshake is done.
         parentIsFriendly = true;
 
-        // Make iframe responsive.
-        iFrame.contentDocument.body.style.height = 'auto';
-
         // Hide scrollbars for correct size.
         iFrame.contentDocument.body.style.overflow = 'hidden';