remove thi canvas from app

build/segmentrtc.html

@@ -187,7 +187,7 @@
 	var tmpCanvas = D.h('canvas', {width: w, height: h}),
         tmpCtx = tmpCanvas.getContext('2d'),
 
-        composedMaskCanvas = D.h('canvas', {width: w, height: h, renderTo: document.body}),
+        composedMaskCanvas = D.h('canvas', {width: w, height: h}),
         composedMaskCtx = composedMaskCanvas.getContext('2d'),
         composedData = composedMaskCtx.getImageData(0,0,w,h),
         composedDataData = composedData.data;