ENGCOM-1546: [Backport] Removed unused class declaration and code #15184

 - Merge Pull Request #15184 from dmytro-ch/magento2:fix/2.1-unused-class-declaration-and-code
 - Merged commits:
   1. 236e1a7

Author: magento-engcom-team

app/code/Magento/Review/view/frontend/templates/redirect.phtml

@@ -8,9 +8,6 @@
 
 ?>
 <?php
-/*    if(isset($GET['limit'])) {
-        $limit = $GET['limit']
-    }*/
     header("Location:{$block->getProduct()->getProductUrl()}#info-product_reviews");
     exit;
 ?>

app/code/Magento/Version/Controller/Index/Index.php

@@ -9,7 +9,6 @@
 use Magento\Framework\App\Action\Action;
 use Magento\Framework\App\Action\Context;
 use Magento\Framework\App\ProductMetadataInterface;
-use Magento\Framework\Exception\StateException;
 
 /**
  * Magento Version controller