How to Hide PJ jQuery UI Helper Admin Menus

function plt_hide_pj_jquery_ui_helper_menus() {
	//Hide the "PJ jQuery UI Helper" menu.
	remove_menu_page('PJ-jQuery-UI-Helper');
	//Hide the "PJ jQuery UI Helper → General Settings" menu.
	remove_submenu_page('PJ-jQuery-UI-Helper', 'PJ-jQuery-UI-Helper');
	//Hide the "PJ jQuery UI Helper → Shortcode Settings" menu.
	remove_submenu_page('PJ-jQuery-UI-Helper', 'PJ-jQuery-UI-Helper_pjjuh_shortcode_settings');
}

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

Where do I put this code?