Several Methods to Remove Genesis Pagination from iThemes Exchange Store Pages - https://amethystwebsitedesign.com/remove-genesis-pagination-from-ithemes-exchange-store-pages/

function1-functions.php

<?php // Remove this line before adding to your functions.php or /exchange/functions.php

//Remove Genesis pagination from Exchange Store page
function my_remove_nav_in_store() {
                remove_action( 'genesis_after_endwhile', 'genesis_posts_nav' );
}
add_action( 'it_exchange_content_store_after_wrap', 'my_remove_nav_in_store' );

function2-functions.php

<?php // Remove this line before adding to your functions.php

// Remove Genesis pagination from all iThemes Exchange pages 
add_action ( 'genesis_after_entry', 'awd_remove_pagination' );
function awd_remove_pagination() {
    if ( it_exchange_is_page() ) {

        remove_action( 'genesis_after_endwhile', 'genesis_posts_nav' );

    }
}

page.php

<?php
/**
 * iThemes Exchange Page 
 * 
 * (Template for Exchange generated ghost pages, automatically used)
 *
 * Create the file in /genesis-child-theme/exchange/page.php
 *
 * @package iThemes Exchange Templates
 * @author  Marcy Diaz, Amethyst Website Design
 * @license GPL-2.0+
 * 
 */

// Add awd-it-exchange-page body class - optional
add_filter( 'body_class', 'awd_exchange_body_class' );
function awd_exchange_body_class( $classes ) {
		$classes[] = 'awd-it-exchange-page';
		return $classes;	
}

// Force full-width-content layout setting - optional
add_filter( 'genesis_pre_get_option_site_layout', '__genesis_return_full_width_content' );

// Remove pagination from iThemes Exchange pages
remove_action( 'genesis_after_endwhile', 'genesis_posts_nav' );

// Genesis loop
genesis();