How to Hide Superb Helper Admin Menus

function plt_hide_superb_helper_menus() {
	//Hide "Superb Helper".
	remove_menu_page('spbhlpr');
	//Hide "Superb Helper → Guides & Recommendations".
	remove_submenu_page('spbhlpr', 'spbhlpr');
	//Hide "Superb Helper → Free Themes".
	remove_submenu_page('spbhlpr', 'spbhlpr_themes');
	//Hide "Superb Helper → Free Plugins".
	remove_submenu_page('spbhlpr', 'spbhlpr_plugins');
	//Hide "Superb Helper → Get Premium".
	remove_submenu_page('spbhlpr', 'spbhlpr_getpremium');
}

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

Where do I put this code?