Fix license header

Author: pawankartik-elastic

x-pack/plugin/fleet/src/internalClusterTest/java/org/elasticsearch/xpack/fleet/action/FleetSearchRemoteIndicesDisallowedIT.java

@@ -1,10 +1,8 @@
 /*
  * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the "Elastic License
- * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
- * Public License v 1"; you may not use this file except in compliance with, at
- * your election, the "Elastic License 2.0", the "GNU Affero General Public
- * License v3.0 only", or the "Server Side Public License, v 1".
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
  */
 
 package org.elasticsearch.xpack.fleet.action;