Suppress warnings on an unused constructor parameter

 - Suppressed warning for unused formal parameter in constructor so that static tests pass
 - Marked unused property as deprecated for future removal

Author: ishakhsuvarov

app/code/Magento/Tax/Block/Adminhtml/Items/Price/Renderer.php

@@ -22,6 +22,8 @@ class Renderer extends \Magento\Backend\Block\Template
 {
     /**
      * @var \Magento\Tax\Helper\Data
+     * @deprecated
+     * Marked as deprecated as it is unused.
      */
     protected $taxHelper;
 
@@ -46,6 +48,7 @@ class Renderer extends \Magento\Backend\Block\Template
      * @param TaxHelper $taxHelper
      * @param ItemPriceRenderer $itemPriceRenderer
      * @param array $data
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      */
     public function __construct(
         \Magento\Backend\Block\Template\Context $context,