Hi @CathyTeng. Thanks for being part of GoDaddy Community! Files you remove from Website Builder should be automatically removed from the URL in question. However, it sometimes doesn't happen immediately. I'm not seeing a PDF at the location you've provided, so it was likely removed shortly after you shared this. Hope that helps.
JesseW - GoDaddy | Community Manager | 24/7 support available at x.co/247support | Remember to choose a solution and give kudos.