How to Hide Amazon Associates Link Builder Admin Menus

function plt_hide_amazon_associates_link_builder_menus() {
	//Hide "Associates Link Builder".
	remove_menu_page('associates-link-builder-about');
	//Hide "Associates Link Builder → About".
	remove_submenu_page('associates-link-builder-about', 'associates-link-builder-about');
	//Hide "Associates Link Builder → Settings".
	remove_submenu_page('associates-link-builder-about', 'associates-link-builder-settings');
	//Hide "Associates Link Builder → Templates".
	remove_submenu_page('associates-link-builder-about', 'associates-link-builder-templates');
}

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

Where do I put this code?