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

mojo/public/python/mojo_application/application_delegate.py

-# 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.
-
-"""Interface for the delegate of ApplicationImpl."""
-
-import mojo_application.application_impl
-import mojo_application.service_provider_impl
-import shell_mojom
-
-import mojo_system
-
-# pylint: disable=unused-argument
-class ApplicationDelegate:
-  def Initialize(self, shell, application):
-    """
-    Called from ApplicationImpl's Initialize() method.
-    """
-    pass
-
-  def OnAcceptConnection(self,
-                         requestor_url,
-                         resolved_url,
-                         service_provider):
-    """
-    Called from ApplicationImpl's OnAcceptConnection() method. Returns a bool
-    indicating whether this connection should be accepted.
-    """
-    return False