MAGETWO-63716: Add target to admin menu element

Author: olysenko

app/code/Magento/Backend/Test/Unit/Block/MenuTest.php

@@ -8,7 +8,6 @@
 use Magento\Backend\Model\Menu\Item;
 use Magento\Backend\Model\Menu as MenuModel;
 use Magento\Backend\Block\Menu;
-use Magento\Backend\Block\Template\Context;
 use Magento\Backend\Model\UrlInterface;
 use Magento\Backend\Model\Menu\Filter\IteratorFactory;
 use Magento\Backend\Model\Auth\Session;
@@ -30,11 +29,6 @@ class MenuTest extends \PHPUnit_Framework_TestCase
      */
     private $menuModelMock;
 
-    /**
-     * @var Context|\PHPUnit_Framework_MockObject_MockObject
-     */
-    private $contextMock;
-
     /**
      * @var UrlInterface|\PHPUnit_Framework_MockObject_MockObject
      */