Revert of mojo: Add a runloop utility in python

mojo/public/python/src/python_system_helper.h

Index: mojo/public/python/src/python_system_helper.h
diff --git a/mojo/public/python/src/python_system_helper.h b/mojo/public/python/src/python_system_helper.h
deleted file mode 100644
index 1962ba787fa067f5c95f79960eefecee041d56a7..0000000000000000000000000000000000000000
--- a/mojo/public/python/src/python_system_helper.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// 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.
-
-#ifndef MOJO_PUBLIC_PYTHON_SRC_PYTHON_SYSTEM_HELPER_H_
-#define MOJO_PUBLIC_PYTHON_SRC_PYTHON_SYSTEM_HELPER_H_
-
-#include "Python.h"
-
-#include "mojo/public/cpp/bindings/callback.h"
-
-namespace mojo {
-
-// Create a mojo::Closure from a callable python object.
-mojo::Closure BuildClosure(PyObject* callable);
-
-// Initalize mojo::RunLoop
-void InitRunLoop();
-
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_PYTHON_SRC_PYTHON_SYSTEM_HELPER_H_