移除layout

var widget = Std.ui("widget",{
    renderTo:"body",
    width:200,
    height:200,
    layout:{
        ui:"HBoxLayout",
        items:[
            {ui:"Button",text:"btn1"},
            {ui:"Button",text:"btn2"}
        ]
    }
});

//3秒之后移除layout
setTimeout(function(){
    widget.removeLayout();
},3000)