How do I remove the Addressfinder widget footer?

The Addressfinder advertising, displayed in the footer of dropdown results list, is a mandatory feature when you are on a free plan but is not mandatory if you are on a paid plan. This advertising does not automatically disappear when you switch from the free plan to a paid plan but can be removed with the addition of a little code.

The code to be added is the widget option "byline": false and is placed within the javascript as per the example below.

  
    var widget, initAF = function() {
      widget = new AddressFinder.Widget(
        document.getElementById("address_line_1")
        "WJPEXCD9AT8H63N7GQUY",
        "NZ",
        { "byline": false }
      )
    }