MC-15763: Introduce critical CSS scope loaded through head

- Stabilization

Author: vzabaznov

app/code/Magento/Theme/Block/Html/Header/CriticalCss.php

@@ -10,7 +10,6 @@
 
 use Magento\Framework\Exception\LocalizedException;
 use Magento\Framework\View\Element\Block\ArgumentInterface;
-use Magento\Framework\View\Element\Template;
 use Magento\Framework\View\Asset\Repository;
 use Magento\Framework\View\Asset\File\NotFoundException;