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

mojo/public/cpp/environment/lib/default_async_waiter.h

Index: mojo/public/cpp/environment/lib/default_async_waiter.h
diff --git a/mojo/public/cpp/environment/lib/default_async_waiter.h b/mojo/public/cpp/environment/lib/default_async_waiter.h
deleted file mode 100644
index 49ce233490ca12ca676c297ae7b775978acabf32..0000000000000000000000000000000000000000
--- a/mojo/public/cpp/environment/lib/default_async_waiter.h
+++ /dev/null
@@ -1,18 +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_CPP_ENVIRONMENT_LIB_DEFAULT_ASYNC_WAITER_H_
-#define MOJO_PUBLIC_CPP_ENVIRONMENT_LIB_DEFAULT_ASYNC_WAITER_H_
-
-struct MojoAsyncWaiter;
-
-namespace mojo {
-namespace internal {
-
-extern const MojoAsyncWaiter kDefaultAsyncWaiter;
-
-}  // namespace internal
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_CPP_ENVIRONMENT_LIB_DEFAULT_ASYNC_WAITER_H_