How to Hide the "Storage Limiter" Admin Menu

function plt_hide_role_based_storage_limiter_menus() {
	//Hide the "Settings → Storage Limiter" menu.
	remove_submenu_page('options-general.php', 'role-based-storage-limiter');
}

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

Where do I put this code?