MC-38893: Avoid BIC making introduced const DDL_EXISTS private in lib/internal/Magento/Framework/DB/Adapter/Pdo/Mysql.php

Author: zakdma

lib/internal/Magento/Framework/DB/Adapter/Pdo/Mysql.php

@@ -665,11 +665,9 @@ protected function _prepareQuery(&$sql, &$bind = [])
         }
 
         // Mixed bind is not supported - so remember whether it is named bind, to normalize later if required
-        $isNamedBind = false;
         if ($bind) {
             foreach ($bind as $k => $v) {
                 if (!is_int($k)) {
-                    $isNamedBind = true;
                     if ($k[0] != ':') {
                         $bind[":{$k}"] = $v;
                         unset($bind[$k]);