Removed customer_subscribe.php and customer_subscribe_rollback.php

Author: sedonik

dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/CreateCustomerTest.php

@@ -276,7 +276,7 @@ public function testCreateCustomerIfNameEmpty()
     }
 
     /**
-     * @magentoApiDataFixture Magento/Customer/_files/customer_subscribe.php
+     * @magentoConfigFixture default_store newsletter/general/active 0
      * @throws \Exception
      */
     public function testCreateCustomerSubscribed()