Duplicate workers

[andersevenrud]

It seems like the webpack example provided by PDFJS droduces duplicate worker files.

                     Asset      Size               Chunks                   Chunk Names
                  logo.svg  3.19 KiB                       [emitted]
                   main.js   900 KiB                 main  [emitted]        main
               main.js.map   1.1 MiB                 main  [emitted] [dev]  main
             pdf.worker.js  1.61 MiB           pdf.worker  [emitted]        pdf.worker
         pdf.worker.js.map  1.94 MiB           pdf.worker  [emitted] [dev]  pdf.worker
    vendors~pdfjsWorker.js  1.55 MiB  vendors~pdfjsWorker  [emitted]        vendors~pdfjsWorker
vendors~pdfjsWorker.js.map  1.87 MiB  vendors~pdfjsWorker  [emitted] [dev]  vendors~pdfjsWorker

Ref: mozilla/pdf.js#10838