message: remove className as prop
diff: import React from 'react'
  import classnames from 'classnames'
  -const CounterLabel = ({className, bg, children}) => (
  +const CounterLabel = ({ bg, children}) => (
  <span
  className={classnames(
  - className,
  'Counter',
  bg ? `Counter--${bg}` : null,
  )}
  