FS-11282: Remove iOS 'controls' hack, not needed

iOS requires a 'playsinline' attribute to be added to video tags, however a
'controls' attribute was erroneously added, and is unneeded.

See https://github.com/webrtc/samples/issues/929#issuecomment-330816567 and
following comments for confirmation.

Removing this attribute reduces UI noise and 'click contention' on video
elements.

html5/verto/js/src/jquery.FSRTC.js

@@ -246,7 +246,6 @@
 
 	    if (iOS) {
 		self.options.useVideo.setAttribute("playsinline", true);
-		self.options.useVideo.setAttribute("controls", true);
 	    }
         }