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

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

-// Copyright 2014 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",
- JavaPackage="org.chromium.mojo.bindings.test.mojom.sample",
- JavaConstantsClassName="InterfaceConstants",
- Foo="hello world"]
-module sample;
-
-const uint64 kLong = 4405;
-
-enum Enum {
-  VALUE,
-};
-
-interface Provider {
-  EchoString(string a) => (string a);
-  EchoStrings(string a, string b) => (string a, string b);
-  EchoMessagePipeHandle(handle<message_pipe> a) => (handle<message_pipe> a);
-  EchoEnum(Enum a) => (Enum a);
-  EchoInt(int32 a) => (int32 a);
-};
-
-interface IntegerAccessor {
-  GetInteger() => (int64 data, [MinVersion=2] Enum type);
-  [MinVersion=1]
-  SetInteger(int64 data, [MinVersion=3] Enum type);
-};
-
-// Used for testing that structs are generated for request params and response
-// params.  Also used to test the generated method ordinals.
-interface SampleInterface {
-  SampleMethod1@1(int32 in1, string? in2) => (string? out1, Enum out2);
-  SampleMethod0@0();
-  SampleMethod2@2();
-};