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

mojo/public/cpp/environment/BUILD.gn

Index: mojo/public/cpp/environment/BUILD.gn
diff --git a/mojo/public/cpp/environment/BUILD.gn b/mojo/public/cpp/environment/BUILD.gn
deleted file mode 100644
index 3248d99592fec52c7e013b4cd911e5d2b9639484..0000000000000000000000000000000000000000
--- a/mojo/public/cpp/environment/BUILD.gn
+++ /dev/null
@@ -1,57 +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.
-
-import("../../mojo_sdk.gni")
-
-mojo_sdk_source_set("environment") {
-  sources = [
-    "async_waiter.h",
-    "environment.h",
-    "logging.h",
-  ]
-
-  mojo_sdk_public_deps = [ "mojo/public/c:environment" ]
-
-  mojo_sdk_deps = [
-    "mojo/public/cpp/bindings:callback",
-    "mojo/public/cpp/system",
-  ]
-}
-
-mojo_sdk_source_set("standalone") {
-  sources = [
-    "lib/async_waiter.cc",
-    "lib/default_async_waiter.cc",
-    "lib/default_async_waiter.h",
-    "lib/default_logger.cc",
-    "lib/default_logger.h",
-    "lib/environment.cc",
-    "lib/logging.cc",
-  ]
-
-  public_deps = [
-    ":environment",
-  ]
-
-  mojo_sdk_deps = [
-    "mojo/public/c:environment",
-    "mojo/public/cpp/system",
-    "mojo/public/cpp/utility",
-  ]
-}
-
-# This provides an implementation of only the logging portion of Environment
-# with minimal external dependencies.
-mojo_sdk_source_set("logging_only") {
-  sources = [
-    "lib/default_logger.cc",
-    "lib/default_logger.h",
-    "lib/logging.cc",
-    "lib/logging_only_environment.cc",
-  ]
-
-  public_deps = [
-    ":environment",
-  ]
-}