message: swap: fix constants import from helpers
diff: @@ -7,9 +7,8 @@ import cssModules from 'react-css-modules'
  import styles from './Swap.scss'
  import { connect } from 'redaction'
  -import helpers from 'helpers'
  +import { links, constants } from 'helpers'
  import actions from 'redux/actions'
  -import constants from 'constants'
  import { swapComponents } from './swaps'
  import Share from './Share/Share'
  