How to Hide ServiceEZ - Sales and Clients Management Admin Menus

function plt_hide_keep_note_menus() {
	//Hide "ServiceEZ".
	remove_menu_page('serviceez');
	//Hide "ServiceEZ → Dashboard".
	remove_submenu_page('serviceez', 'serviceez');
	//Hide "ServiceEZ → New Service".
	remove_submenu_page('serviceez', 'http://127.0.0.1/wp-admin/admin.php?page=serviceez/#/new-service');
	//Hide "ServiceEZ → Services".
	remove_submenu_page('serviceez', 'http://127.0.0.1/wp-admin/admin.php?page=serviceez/#/services');
	//Hide "ServiceEZ → Orders".
	remove_submenu_page('serviceez', 'http://127.0.0.1/wp-admin/admin.php?page=serviceez/#/orders');
	//Hide "ServiceEZ → Clients".
	remove_submenu_page('serviceez', 'http://127.0.0.1/wp-admin/admin.php?page=serviceez/#/clients');
	//Hide "ServiceEZ → Messaging".
	remove_submenu_page('serviceez', 'http://127.0.0.1/wp-admin/admin.php?page=serviceez/#/messaging');
	//Hide "ServiceEZ → Coupons".
	remove_submenu_page('serviceez', 'http://127.0.0.1/wp-admin/admin.php?page=serviceez/#/coupons');
	//Hide "ServiceEZ → Notifications".
	remove_submenu_page('serviceez', 'http://127.0.0.1/wp-admin/admin.php?page=serviceez/#/notifications');
	//Hide "ServiceEZ → Settings".
	remove_submenu_page('serviceez', 'http://127.0.0.1/wp-admin/admin.php?page=serviceez/#/settings');
	//Hide "ServiceEZ → Frontend App ↗️".
	remove_submenu_page('serviceez', 'http://127.0.0.1/serviceez');
}

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