#10919: update OrderService to return correct bool value

 - update OrderService to return correct bool value for cancel method
 - removed redundant type casting

Author: ishakhsuvarov

app/code/Magento/Sales/Model/Service/OrderService.php

@@ -87,7 +87,7 @@ public function __construct(
     public function cancel($id)
     {
         $order = $this->orderRepository->get($id);
-        if ((bool)$order->canCancel()) {
+        if ($order->canCancel()) {
             $order->cancel();
             $this->orderRepository->save($order);
             return true;