fix: Revert "refactor: Reduce bundle size (#1575)" (#1622)

This reverts commit 81dcbe294d.

platform/viewer/src/lib/localFileLoaders/pdfFileLoader.js

@@ -1,10 +1,9 @@
+import cornerstoneWADOImageLoader from 'cornerstone-wado-image-loader';
 import FileLoader from './fileLoader';
-import { getCornerstoneWADOImageLoader } from '../../utils/cornerstoneWADOImageLoader';
 
 const PDFFileLoader = new (class extends FileLoader {
   fileType = 'application/pdf';
-  async loadFile(file, imageId) {
-    const cornerstoneWADOImageLoader = await getCornerstoneWADOImageLoader();
+  loadFile(file, imageId) {
     return cornerstoneWADOImageLoader.wadouri.loadFileRequest(imageId);
   }