Remove unnecessary line

Author: Milder Hernandez Cagua

api-test/integration-tests/src/test/java/com/microsoft/semantickernel/tests/ResponseSchemaTest.java

@@ -160,8 +160,6 @@ private static void verifyCalled(OpenAIAsyncClient client, String expected) {
                                 writer,
                                 new JsonOptions()
                             );
-                            JsonWriter format = chatCompletionsOptions.getResponseFormat()
-                                .toJson(jsonWriter);
                             jsonWriter.flush();
                             writer.flush();