The academy Pro child theme by StudioPress includes 2 lines of code on lines 393 & 394 in functions.php which reposition the featured image on all archive page types.
This means the standard code to remove the post image will not work as the hook has changed from
genesis_entry_header so you need to use another hook.
Here’s the code which is tested and works :
This code creates a category.php file which once added to the Academy Pro child themes root directory, removes the featured image on category archives only.
Use the WordPress Template Hierarchy to name your file to target specific archives.