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

mojo/public/python/src/python_system_helper.cc

-// 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.
-
-#include "mojo/public/python/src/python_system_helper.h"
-
-#include "Python.h"
-
-#include "mojo/public/cpp/utility/run_loop.h"
-#include "mojo/public/python/src/common.h"
-
-namespace {
-class QuitCurrentRunLoop : public mojo::Closure::Runnable {
- public:
-  void Run() const override {
-    mojo::RunLoop::current()->Quit();
-  }
-
-  static mojo::Closure NewQuitClosure() {
-    return mojo::Closure(
-        static_cast<mojo::Closure::Runnable*>(new QuitCurrentRunLoop()));
-  }
-};
-
-}  // namespace
-
-namespace mojo {
-namespace python {
-
-Closure BuildClosure(PyObject* callable) {
-  if (!PyCallable_Check(callable))
-    return Closure();
-
-  return mojo::Closure(
-      NewRunnableFromCallable(callable, QuitCurrentRunLoop::NewQuitClosure()));
-}
-
-PythonAsyncWaiter* NewAsyncWaiter() {
-  return new PythonAsyncWaiter(QuitCurrentRunLoop::NewQuitClosure());
-}
-
-}  // namespace python
-}  // namespace mojo