PropType is defined but prop is never used

const propTypes = {
  prop1: PropTypes.string,
  prop2: PropTypes.string,
  prop3: PropTypes.number,
};

const something = (props) => ((props.props2 > 0 & props.prop1 === props.props3) ?
  t('translation/abc')
  : t('translation/def'));

why does the component throw lint error PropType is defined but prop is never used for all three props prop1, prop2, prop3?