message: RadioGroup: remove unnecessary styles
diff: -.RadioGroup {
  - border: none;
  - min-width: 0; /* resets default browser styles for fieldset */
  - margin: 0; /* resets default browser styles for fieldset */
  - padding: 12px 0;
  - box-sizing: border-box;
  -}
  -
  .RadioGroup--horizontal {
  display: flex;
  }
  * FormItem
  */
  .FormItem .RadioGroup {
  - padding: 0;
  margin: 0 calc(-1 * var(--formitem_padding));
  box-sizing: content-box;
  }
  