message: remove inline double-render fix for Details
diff: @@ -19,9 +19,6 @@ class Details extends React.Component {
  render() {
  const {className, children, render = getRenderer(children), ...rest} = this.props
  - // XXX this guards against "double renders" in system-components,
  - // and prevents prop type warnings for the HTML is attribute
  - delete rest.is
  const {open} = this.state
  return (
  