How to Hide پرداخت دلخواه Admin Menus

function plt_hide_pardakht_delkhah_menus() {
	//Hide "Custom payment".
	remove_menu_page('edit.php?post_type=cupri_pay');
	//Hide "Custom payment → Custom payment".
	remove_submenu_page('edit.php?post_type=cupri_pay', 'edit.php?post_type=cupri_pay');
	//Hide "Custom payment → Custom Fields".
	remove_submenu_page('edit.php?post_type=cupri_pay', 'cupri-fields');
	//Hide "Custom payment → Gateway Settings".
	remove_submenu_page('edit.php?post_type=cupri_pay', 'cupri-gateways');
	//Hide "Custom payment → Settings".
	remove_submenu_page('edit.php?post_type=cupri_pay', 'cupri-settings');
	//Hide "Custom payment → Custom link".
	remove_submenu_page('edit.php?post_type=cupri_pay', 'cupri-custom-link');
	//Hide "Custom payment → Export".
	remove_submenu_page('edit.php?post_type=cupri_pay', 'cupri-export');
	//Hide "Custom payment → Help".
	remove_submenu_page('edit.php?post_type=cupri_pay', 'cupri-help');
}

add_action('admin_menu', 'plt_hide_pardakht_delkhah_menus', 11);
Where do I put this code?