How to Hide Filter Plus Admin Menus

function plt_hide_filter_plus_menus() {
	//Hide "Filter Plus".
	remove_menu_page('filter_plus');
	//Hide "Filter Plus → Overview".
	remove_submenu_page('filter_plus', 'filter-plus-overview');
	//Hide "Filter Plus → Filter Options".
	remove_submenu_page('filter_plus', 'filter-options');
	//Hide "Filter Plus → Filter Sets".
	remove_submenu_page('filter_plus', 'filter-sets');
	//Hide "Filter Plus → Settings".
	remove_submenu_page('filter_plus', 'filter-plus-settings');
	//Hide "Filter Plus → Upgrade To Premium".
	remove_submenu_page('filter_plus', 'https://wpbens.com/filter-plus');
}

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

Where do I put this code?