message: remove uneeded setters
diff: @@ -811,8 +811,6 @@ export default class Validator
  // if its not required and is empty or null or undefined then it passes.
  if (! field.required && ~[null, undefined, ''].indexOf(value)) {
  this._setAriaValidAttribute(field, true);
  - field.invalid = false;
  - field.valid = true;
  if (field.events && isCallable(field.events.after)) {
  field.events.after({ valid: true });
  }
  