Disable drag n drop on grid

HTML

<link rel="stylesheet" href="http://cdn.sencha.com/ext/gpl/4.2.1/resources/css/ext-all.css">
<script src="http://cdn.sencha.com/ext/gpl/4.2.1/ext-all-dev.js"></script>

JavaScript

Ext.create('Ext.data.Store', {
    storeId:'simpsonsStore',
    fields:['name'],
    data: [["Lisa"], ["Bart"], ["Homer"], ["Marge"]],
    proxy: {
        type: 'memory',
        reader: 'array'
    }
});

var panel = Ext.create('Ext.grid.Panel', {
    store: 'simpsonsStore',
    columns: [
        {header: 'Name',  dataIndex: 'name', flex: true}
    ],
    viewConfig: {
        plugins: {
            ptype: 'gridviewdragdrop',
            dragText: 'Drag and drop to reorganize'
        }
    },
    height: 200,
    width: 400,
    renderTo: Ext.getBody()
});
panel.view.plugins[0].disable();