SkeletonHelper: Removed (I believe) unneeded call.

src/helpers/SkeletonHelper.js

@@ -54,11 +54,8 @@ function SkeletonHelper( object ) {
 	this.matrix = object.matrixWorld;
 	this.matrixAutoUpdate = false;
 
-	this.onBeforeRender();
-
 }
 
-
 SkeletonHelper.prototype = Object.create( LineSegments.prototype );
 SkeletonHelper.prototype.constructor = SkeletonHelper;