add_filter('intermediate_image_sizes_advanced', 'remove_unnecessaty_image_sizes');
function remove_unnecessaty_image_sizes($sizes) {

    unset($sizes['1536x1536']); // disable 2x medium-large size
    unset($sizes['2048x2048']); // disable 2x large size

    remove_image_size( '2048x2048' );
    remove_image_size( '1536x1536' );
    return $sizes;

}