message: remove color from Avatar
diff: import PropTypes from 'prop-types'
  import styled from 'styled-components'
  -import {themeGet, space, color} from 'styled-system'
  +import {themeGet, space} from 'styled-system'
  import theme from './theme'
  function borderRadius({size}) {
  @@ -18,7 +18,7 @@ const Avatar = styled.img.attrs(props => ({
  line-height: ${themeGet('lineHeights.condensedUltra', 1)};
  vertical-align: middle;
  ${borderRadius};
  - ${space} ${color};
  + ${space};
  `
  Avatar.defaultProps = {
  @@ -30,7 +30,9 @@ Avatar.defaultProps = {
  Avatar.propTypes = {
  alt: PropTypes.string.isRequired,
  size: PropTypes.number,
  - src: PropTypes.string
  + src: PropTypes.string,
  + ...space.propTypes,
  + theme: PropTypes.object
  }
  export default Avatar
  