How to Hide SureForms Admin Menus

function plt_hide_sureforms_menus() {
	//Hide "Tools → Scheduled Actions".
	remove_submenu_page('tools.php', 'action-scheduler');

	//Hide "SureForms".
	remove_menu_page('sureforms_menu');
	//Hide "SureForms → Dashboard".
	remove_submenu_page('sureforms_menu', 'sureforms_menu');
	//Hide "SureForms → Forms".
	remove_submenu_page('sureforms_menu', 'edit.php?post_type=sureforms_form');
	//Hide "SureForms → New Form".
	remove_submenu_page('sureforms_menu', 'add-new-form');
	//Hide "SureForms → Entries".
	remove_submenu_page('sureforms_menu', 'sureforms_entries');
	//Hide "SureForms → Settings".
	remove_submenu_page('sureforms_menu', 'sureforms_form_settings');
	//Hide "SureForms → Upgrade".
	remove_submenu_page('sureforms_menu', 'https://sureforms.com/upgrade?utm_medium=submenu_link_upgrade');
}

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