ACPT-1229: Remove the use of the default gender selection in the performance generator

Author: slopukhov

setup/src/Magento/Setup/Model/FixtureGenerator/CustomerTemplateGenerator.php

@@ -94,7 +94,6 @@ private function getCustomerTemplate()
                 'disable_auto_group_change' => '0',
                 'dob' => '12-10-1991',
                 'firstname' => 'Firstname',
-                'gender' => 1,
                 'group_id' => '1',
                 'lastname' => 'Lastname',
                 'middlename' => '',