Hello,

Those banners images comes from html blocks, and their shortcodes used in the product category description in Products >> Categories.

So if you want to hide those banners you have to edit specific HTML BLOCKS one by one and add custom CSS class by edit the row which contains the banner contents.

Then you have to target that CSS class to hide it.

OR

The shorter way is to directly hide the description area in category pages, You have to use the below CSS code in Custom CSS for mobile and Custom CSS for mobile landscape from theme settings >> Custom CSS.

.shop-content-area .term-description{
display:none;
}

Best Regards.