How to Hide SearchWP Live Ajax Search Admin Menus

function plt_hide_searchwp_live_ajax_search_menus() {
	//Hide "SearchWP".
	remove_menu_page('searchwp-forms');
	//Hide "SearchWP → Search Forms".
	remove_submenu_page('searchwp-forms', 'searchwp-forms');
	//Hide "SearchWP → Algorithm".
	remove_submenu_page('searchwp-forms', 'searchwp-algorithm');
	//Hide "SearchWP → Settings".
	remove_submenu_page('searchwp-forms', 'searchwp-live-search');
	//Hide "SearchWP → Upgrade to Pro".
	remove_submenu_page('searchwp-forms', 'https://searchwp.com/?utm_source=WordPress&utm_medium=Admin+Menu+Upgrade+Link&utm_campaign=Live+Ajax+Search&utm_content=Upgrade+to+Pro');
}

add_action('admin_menu', 'plt_hide_searchwp_live_ajax_search_menus', 11);
Where do I put this code?