Fixes CORS error when downloading attachments. (#1254)

* Refactored the download util to directly use the file url instead of fetching the file content using axios.

* Removed the unused file download api file.

src/components/Attachments/utils.js

@@ -1,29 +1,23 @@
 import { Toastr } from "neetoui";
 import { mergeRight } from "ramda";
 
-import fileDownloadApi from "apis/file_download";
-
 import { DEFAULT_FILE_UPLOAD_CONFIG } from "./constants";
 
 export const buildFileUploadConfig = config =>
   mergeRight(DEFAULT_FILE_UPLOAD_CONFIG, config);
 
-export const downloadFile = async (fileUrl, filename) => {
+export const downloadFile = (fileUrl, filename) => {
   try {
-    const response = await fileDownloadApi.getFile(fileUrl);
-    const blob = new Blob([response.data]);
-    const url = URL.createObjectURL(blob);
-
     const a = document.createElement("a");
-    a.href = url;
+    a.href = fileUrl;
     a.setAttribute("download", filename);
+    a.setAttribute("target", "_blank");
 
     a.style.display = "none";
     document.body.appendChild(a);
 
     a.click();
 
-    URL.revokeObjectURL(url);
     document.body.removeChild(a);
   } catch (error) {
     Toastr.error(error);