Delete pictures on a page

Hi my client uses wordpress for a photo gallery site. A page or a post can be used as a gallery page and can upload hundreds of pictures to that page or post. The galleries don’t last forever and I wanted to know if there was a quick way to delete all photos out of the media library when my client decides to delete the page? I know you can upload picture to the post rather than to the whole media library so is there a way to automatically remove them when you delete the page.

Thanks.