Delete dead (and obsolete) display compositor API

services/ui/gpu/display_compositor/BUILD.gn

Index: services/ui/gpu/display_compositor/BUILD.gn
diff --git a/services/ui/gpu/display_compositor/BUILD.gn b/services/ui/gpu/display_compositor/BUILD.gn
deleted file mode 100644
index 36505d6805bf46c0c716d36720f46079c7802b72..0000000000000000000000000000000000000000
--- a/services/ui/gpu/display_compositor/BUILD.gn
+++ /dev/null
@@ -1,31 +0,0 @@
-# Copyright 2016 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("//build/config/ui.gni")
-
-source_set("display_compositor") {
-  sources = [
-    "compositor_frame_sink_delegate.h",
-    "compositor_frame_sink_factory_impl.cc",
-    "compositor_frame_sink_factory_impl.h",
-    "compositor_frame_sink_impl.cc",
-    "compositor_frame_sink_impl.h",
-    "display_compositor_impl.cc",
-    "display_compositor_impl.h",
-    "display_impl.cc",
-    "display_impl.h",
-  ]
-
-  deps = [
-    "//base",
-    "//cc",
-    "//cc/ipc:interfaces",
-    "//cc/surfaces",
-    "//cc/surfaces:surface_id",
-    "//services/ui/public/interfaces/gpu:interfaces",
-
-    # TODO(fsamuel): Remove this dependency.
-    "//services/ui/surfaces",
-  ]
-}