Revert portfolio grid images to original size

Hello!

I’ve added some custom code to change the dimensions of the portfolio grid using this code:

function enfold_customization_modify_thumb_size( $size ) {
$size[‘portfolio_small’] = array(‘width’=>1200, ‘height’=>1600);
return $size;
}
/*filter portfolio sorting */
add_filter(‘avia_post_grid_query’, ‘avf_custom_post_grid_query’);

function avf_custom_post_grid_query ( $query ) {
if(is_singular(‘portfolio’)) {
$query[‘offset’] = 1;
}
return $query;
}

Works great, but now our client is asking us to revert to the original enfold portfolio ratio (landscape) :(
We’ve tried deleting the code from Enfold Child functions php. but nothing seems to change.
Are we missing any action, asides from deleting the code from theme functions?

Thanks a lot for your help.