Optionally remove display of VAT Number from checkout form

Patch.

There is some javascript code starting on line 70 of recurlyjs/recurly-element.js which has some conditional logic. It looks like it tries to hide the element unless an EU country is selected in the country field. However this probably broke during the V3 refactor. It might be worthwhile to clean this up or even fix it.

// VAT is only needed for EU countries.
(function () {
  var country = $('#country');
  var vatNumber = $('#vat-number');
  var euCountries = [
    'AT', 'BE', 'BG', 'CY', 'CZ', 'DK', 'EE', 'ES', 'FI', 'FR',
    'DE', 'GB', 'GR', 'HU', 'IE', 'IT', 'LV', 'LT', 'LU', 'MT',
    'NL', 'PL', 'PT', 'RO', 'SE', 'SI', 'SK', 'HR'
  ];

  country.on('change init', function (event) {
    if (~euCountries.indexOf(this.value)) {
      vatNumber.show();
    } else {
      vatNumber.hide();
    }
  }).triggerHandler('init');
})();

})(jQuery);