Backbone.Model.destroy method workaround for jQuery 1.9+

model.js

model.destroy({
  wait: true,
  dataType: 'text', // Set this to `text`
  success: function() {
    // will be called even if server returns empty string, 
    // which is normal behavior for DELETE requests
    // See #2218 (https://github.com/jashkenas/backbone/issues/2218) for details
  }
});