How to Hide WS Form LITE Admin Menus

function plt_hide_ws_form_menus() {
	//Hide "WS Form".
	remove_menu_page('ws-form');
	//Hide "WS Form → Forms".
	remove_submenu_page('ws-form', 'ws-form');
	//Hide "WS Form → Add Form".
	remove_submenu_page('ws-form', 'ws-form-add');
	//Hide "WS Form → Submissions".
	remove_submenu_page('ws-form', 'ws-form-submit');
	//Hide "WS Form → Styles".
	remove_submenu_page('ws-form', 'ws-form-style');
	//Hide "WS Form → Add Style".
	remove_submenu_page('ws-form', 'ws-form-style-add');
	//Hide "WS Form → Settings".
	remove_submenu_page('ws-form', 'ws-form-settings');
	//Hide "WS Form → Upgrade to PRO".
	remove_submenu_page('ws-form', 'ws-form-upgrade');
	//Hide "WS Form → Add-Ons".
	remove_submenu_page('ws-form', 'ws-form-add-ons');
}

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

Where do I put this code?