Move services code brought in from Mojo to live under //third_party.

mojo/services/accessibility/public/interfaces/BUILD.gn

Index: mojo/services/accessibility/public/interfaces/BUILD.gn
diff --git a/mojo/services/accessibility/public/interfaces/BUILD.gn b/mojo/services/accessibility/public/interfaces/BUILD.gn
deleted file mode 100644
index 7997908c0599edbabfd3cf8eb399e7dfbb413b0e..0000000000000000000000000000000000000000
--- a/mojo/services/accessibility/public/interfaces/BUILD.gn
+++ /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.
-
-import("../../../mojo_sdk_root.gni")
-import("$mojo_sdk_root/mojo/public/tools/bindings/mojom.gni")
-
-mojom("interfaces") {
-  sources = [
-    "accessibility.mojom",
-  ]
-
-  import_dirs = [ get_path_info("../../../", "abspath") ]
-
-  deps = [
-    "../../../geometry/public/interfaces",
-  ]
-}