Zircon subtheme fails to include zircon include file skins_menu.inc

Drupal core 8.1.9

Im sorry - Im newbie and my English very bad =(

I tried make Zircon sub theme, but get error:

Warning: include_once(themes/zircon_subtheme/assets/includes/skins-menu/skins_menu.inc): failed to open stream: No such file or directory in include_once() (line 7 of D:\Sites\Apache\htdocs\sh15\themes\zircon\zircon.theme).

I investigated zircon.theme at line 7 and see something:

include_once(drupal_get_path('theme', $active_theme) . '/assets/includes/skins-menu/skins_menu.inc');

My folder with sub theme contains only two file:
/themes/zircon_subtheme/zircon_subtheme.info.yml:

name: zircon_subtheme
type: theme
base theme: zircon
description: This is a sub theme of Zircon
version: 8.1.3
core: 8.x
libraries:
- zircon_subtheme/global-styling
regions:
header: Header
primary_menu: 'Primary menu'
secondary_menu: 'Secondary menu'
main_menu: 'Main menu'
slideshow: Slideshow
help: Help
page_top: 'Page top'
page_bottom: 'Page bottom'
messages: Messages
featured: Featured
breadcrumb: Breadcrumb
content: Content
sidebar_first: 'Sidebar first'
sidebar_second: 'Sidebar second'
panel_first_1: 'Panel first col 1'
panel_second_1: 'Panel second col 1'
panel_second_2: 'Panel second col 2'
panel_second_3: 'Panel second col 3'
panel_second_4: 'Panel second col 4'
footer: Footer

/themes/zircon_subtheme/zircon_subtheme.libraries.yml:

global-styling:
version: 8.0.0
css:
base:
assets/css/style.css: {}

Can I do something for fix it problem? =) Thank you.