Get current page url and simply apply display none css on button based on current page inside wp_footer action for woocommerce pages you can use predefined functions like is_cart(),is_checkout()..(see code)
just put below code inside your child theme functions.php file
function hide_oneclick_toolbar()
{
if(is_cart() || is_checkout())
{
?>
<style>#pojo-a11y-toolbar{display:none!important;}</style>
<?php
}
}
add_action('wp_footer','hide_oneclick_toolbar');
**hide by specific url**
function hide_oneclick_toolbar()
{
global $wp;
$current_url = home_url($wp->request ); //current page url
$urls_to_hide = array(get_site_url().'/jet/test',get_site_url().'/cart',get_site_url().'/checkout'); // array of urls on which you want to hide toolbar
if(in_array($current_url, $urls_to_hide))
{
?>
<style>#pojo-a11y-toolbar{display:none!important;}</style>
<?php
}
else
{
?>
<style>#pojo-a11y-toolbar{display:block!important;}</style>
<?php
}
}
add_action('wp_footer','hide_oneclick_toolbar');