Updated FileUpload/Index.js

Fixed those issues:
- CancelToken was failed in Typescript
- isCancel not found axios

Author: niyoceles

src/pages/FileUpload/index.js

@@ -1,10 +1,13 @@
 import React, { useState, useRef } from "react";
 import Header from "components/Header";
-import axios, { CancelToken, isCancel } from "axios";
+import axios from "axios";
 import { ProgressBar } from "react-bootstrap";
 import ExternalInfo from "components/ExternalInfo";
 import AppConfig from "App.config";
 
+const cancelToken = axios.CancelToken;
+const isCancel = axios.isCancel;
+
 const FileUpload = () => {
     const [uploadPercentage, setUploadPercentage] = useState(0);
     const cancelFileUpload = useRef(null);