Don't include specific Register Helper checkout box/boxes on the checkout page for members

my_pmprorh_remove_box_for_members.php

// don't include specific Register Helper checkout box/boxes on the checkout page for members
function my_pmprorh_remove_box_for_members(){
	if( pmpro_hasMembershipLevel() )
	{
		global $pmprorh_checkout_boxes;

		// change this line to include the name of the checkout box(es) to remove
		$boxes_to_remove = array("more_fields");

		$new_boxes = [];
		$count = 0;
		foreach($pmprorh_checkout_boxes as $key => $value )
		{
			if( !in_array( $pmprorh_checkout_boxes[$key]->name, $boxes_to_remove ) )
			{
				$new_boxes[] = $pmprorh_checkout_boxes[$key];
				$new_boxes[$count]->order = $count;
				$count++;
			}
		}
		$pmprorh_checkout_boxes = $new_boxes;
	}
}
add_action('pmpro_checkout_preheader', 'my_pmprorh_remove_box_for_members');