message: clean not used router code (imports)
diff: import React, { Component } from 'react'
  import { IntlProvider, addLocaleData } from 'react-intl'
  -import { Switch, Route, BrowserRouter, HashRouter } from 'react-router-dom'
  -//import { Route } from 'react-router'
  +import { Switch, Route, HashRouter } from 'react-router-dom'
  import localeEn from 'react-intl/locale-data/en'
  import localeRu from 'react-intl/locale-data/ru'
  import localeNl from 'react-intl/locale-data/nl'
  