How to delete old Trailer?

I have a very old film that still plays the trailer as the highlight of my page. I was the person that put the film into IMDb with the trailer. But I can’t find where to delete the trailer in any of the editing settings. I’ve read that trailers from withoutabox cannot be removed, I don’t remember if that’s how the film was automatically added to IMDb but I don’t think so. I really need this film trailer removed, or do I just remove the entire film does that solve the issue?

thank you!