fix: address review comments from wing328

- Add docstring to deserializeErrorEntity method
- Remove SmartBear Software copyright from test files

Author: Chhida

modules/openapi-generator/src/main/resources/Java/libraries/jersey3/ApiClient.mustache

@@ -1358,6 +1358,15 @@ public class ApiClient{{#jsr310}} extends JavaTimeFormatter{{/jsr310}} {
     }
   }
   
+  /**
+   * Deserialize the response body into an error entity based on HTTP status code.
+   * Looks up the error type from the errorTypes map using the response status code,
+   * or falls back to the "default" error type if no match is found.
+   *
+   * @param errorTypes Map of status code strings to GenericType for deserialization
+   * @param response The HTTP response
+   * @return The deserialized error entity, or null if not found or deserialization fails
+   */
   private Object deserializeErrorEntity(Map<String, GenericType> errorTypes, Response response) {
     if (errorTypes == null) {
       return null;

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/jersey3/JavaJersey3ErrorEntityFunctionalTest.java

@@ -1,6 +1,5 @@
 /*
  * Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
- * Copyright 2018 SmartBear Software
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/jersey3/JavaJersey3ErrorEntityTest.java

@@ -1,6 +1,5 @@
 /*
  * Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
- * Copyright 2018 SmartBear Software
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.