- Remove optional license property

- License in all header files

samples/client/petstore/objc/SwaggerClient/Model/SWGUser.h

@@ -2,10 +2,28 @@
 #import "SWGObject.h"
 
 /**
- * NOTE: This class is auto generated by the swagger code generator program.
- * https://github.com/swagger-api/swagger-codegen
- * Do not edit the class manually.
- */
+* Swagger Petstore
+* This is a sample server Petstore server.  You can find out more about Swagger at <a href=\"http://swagger.io\">http://swagger.io</a> or on irc.freenode.net, #swagger.  For this sample, you can use the api key \"special-key\" to test the authorization filters
+*
+* OpenAPI spec version: 1.0.0
+* Contact: apiteam@wordnik.com
+*
+* NOTE: This class is auto generated by the swagger code generator program.
+* https://github.com/swagger-api/swagger-codegen.git
+* Do not edit the class manually.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/