Make the fuchsia mojo/public repo the source of truth.

mojo/public/interfaces/bindings/tests/versioning_test_client.mojom

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-[DartPackage="_mojo_for_test_only"]
-module mojo.test.versioning;
-
-// versioning_test_service.mojom and versioning_test_client.mojom contain
-// different versions of Mojom definitions for a fictitious human resource
-// management system. They are used to test the versioning mechanism.
-
-enum Department {
-  SALES,
-  DEV,
-};
-
-struct Employee {
-  uint64 employee_id;
-  string name;
-  Department department;
-};
-
-[ServiceName="mojo::test::versioning::HumanResourceDatabase"]
-interface HumanResourceDatabase {
-  AddEmployee(Employee employee) => (bool success);
-
-  QueryEmployee(uint64 id, [MinVersion=1] bool retrieve_finger_print)
-      => (Employee? employee, [MinVersion=1] array<uint8>? finger_print);
-
-  [MinVersion=1]
-  AttachFingerPrint(uint64 id, array<uint8> finger_print) => (bool success);
-
-  [MinVersion=2]
-  ListEmployeeIds() => (array<uint64>? ids);
-};