message: Position tweak
diff: @@ -36,7 +36,6 @@ export const Fixed = withPosition('fixed')
  export const Relative = withPosition('relative')
  export const Sticky = withPosition('sticky')
  Sticky.defaultProps = {
  - is: PropTypes.oneOfType([PropTypes.string, PropTypes.func]),
  theme,
  top: 0,
  zIndex: 1
  