How to Hide the "Trustindex.io" Admin Menu

function plt_hide_wp_reviews_plugin_for_google_menus() {
	//Hide the "Trustindex.io" menu.
	remove_menu_page('wp-reviews-plugin-for-google/settings.php');
}

add_action('admin_menu', 'plt_hide_wp_reviews_plugin_for_google_menus', 11);

Where do I put this code?