message: lint and fix up props.js
diff: import PropTypes from 'prop-types'
  -import classnames from 'classnames'
  import createMapper from 'system-classnames'
  const breakpoints = [null, 'sm', 'md', 'lg', 'xl']
  -const call = (f, v) => (typeof f === 'function') ? f(v) : f || v
  -
  -export const oneOrMoreOf = type => PropTypes.oneOfType([
  - type,
  - PropTypes.arrayOf(type)
  -])
  +export const oneOrMoreOf = type => PropTypes.oneOfType([type, PropTypes.arrayOf(type)])
  export const oneOrMoreNumbers = oneOrMoreOf(PropTypes.number)
  @@ -24,21 +18,12 @@ export const createMapperWithPropTypes = config => {
  const map = createMapperWithPropTypes({
  breakpoints,
  - props: [
  - 'm', 'mt', 'mr', 'mb', 'ml', 'mx', 'my',
  - 'p', 'pt', 'pr', 'pb', 'pl', 'px', 'py'
  - ],
  - getter: ({breakpoint, prop, value}) => breakpoint
  - ? [prop, breakpoint, value].join('-')
  - : [prop, value].join('-')
  + props: ['m', 'mt', 'mr', 'mb', 'ml', 'mx', 'my', 'p', 'pt', 'pr', 'pb', 'pl', 'px', 'py'],
  + getter: ({breakpoint, prop, value}) => (breakpoint ? [prop, breakpoint, value].join('-') : [prop, value].join('-'))
  })
  export default map
  -function unique(values) {
  - return values.filter((v, i) => values.indexOf(v) === i)
  -}
  -
  export function stylizer(propsToPass) {
  return props => {
  const copy = {...props}
  