message: remove iotex-react-language-dropdown
diff: "graphql-tag": "2.10.1",
  "iotex-antenna": "0.13.0",
  "iotex-react-block-producers": "1.2.2",
  - "iotex-react-language-dropdown": "1.2.2",
  "is-browser": "2.1.0",
  "isomorphic-unfetch": "3.0.0",
  "koa-server-http-proxy": "0.1.0",
  