"Suppress" ALT text

Please have a look at https://www.julienbalmer.com/heads/jb-tamy-glauser-bali-fashion-editorial, on the bottom left you can see the image title and the description I entered for this image. Is it possible to suppress the displaying of both image title and description, so it looks cleaner and more minimalistic, like for example https://www.julienbalmer.com/heads/jb-berliner-mode-shooting-youth (where I didn't add title and description). For SEO and google I would still like the title and the description to be there though. Can do with CSS?

Thank you all. 

You can use this code to Website > Website Tools > Custom CSS

div.slide-meta-wrapper {
    visibility: hidden;
}