MAGETWO-82557: Clean unreachable code in creditmemo model #11663

 - Merge Pull Request #11663 from adrian-martinez-interactiv4/magento2:FR#CLEAN-UNREACHABLE-CODE-CREDITMEMO-MODEL
 - Merged commits:
   1. 9c19a4c

Author: Oleksii Korshenko

app/code/Magento/Sales/Model/Order/Creditmemo.php

@@ -412,23 +412,6 @@ public function canCancel()
     public function canVoid()
     {
         return false;
-        $canVoid = false;
-        if ($this->getState() == self::STATE_REFUNDED) {
-            $canVoid = $this->getCanVoidFlag();
-            /**
-             * If we not retrieve negative answer from payment yet
-             */
-            if (is_null($canVoid)) {
-                $canVoid = $this->getOrder()->getPayment()->canVoid();
-                if ($canVoid === false) {
-                    $this->setCanVoidFlag(false);
-                    $this->_saveBeforeDestruct = true;
-                }
-            } else {
-                $canVoid = (bool)$canVoid;
-            }
-        }
-        return $canVoid;
     }
 
     /**