How to Hide Albert - The AI Butler Admin Menus

function plt_hide_albert_ai_butler_menus() {
	//Hide "Albert".
	remove_menu_page('albert');
	//Hide "Albert → Dashboard".
	remove_submenu_page('albert', 'albert');
	//Hide "Albert → Abilities".
	remove_submenu_page('albert', 'albert-abilities');
	//Hide "Albert → Connections".
	remove_submenu_page('albert', 'albert-connections');
	//Hide "Albert → Settings".
	remove_submenu_page('albert', 'albert-settings');
}

add_action('admin_menu', 'plt_hide_albert_ai_butler_menus', 21);

Where do I put this code?