MC-37313: [Create UPS shipping label] Error message appears "Failed to send items" if Signature Confirmation is set to Not Required

Author: yelahin-serhiy

dev/tests/integration/testsuite/Magento/Ups/Model/CarrierTest.php

@@ -252,7 +252,6 @@ public function testRequestToShipment(): void
                             'weight' => '0.55',
                             'customs_value' => '20.00',
                             'container' => 'Large Express Box',
-                            'delivery_confirmation_level' => 1,
                             'delivery_confirmation' => 0,
                         ],
                         'items' => [