Ozone: Remove the caca platform from the tree

ui/ozone/platform/caca/BUILD.gn

Index: ui/ozone/platform/caca/BUILD.gn
diff --git a/ui/ozone/platform/caca/BUILD.gn b/ui/ozone/platform/caca/BUILD.gn
deleted file mode 100644
index be3fbb9d43513aa85c4da5d6642b266f5a5e8c25..0000000000000000000000000000000000000000
--- a/ui/ozone/platform/caca/BUILD.gn
+++ /dev/null
@@ -1,43 +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("//build/config/linux/pkg_config.gni")
-
-visibility = [ "//ui/ozone/*" ]
-
-source_set("caca") {
-  sources = [
-    "caca_event_source.cc",
-    "caca_event_source.h",
-    "caca_window.cc",
-    "caca_window.h",
-    "caca_window_manager.cc",
-    "caca_window_manager.h",
-    "client_native_pixmap_factory_caca.cc",
-    "client_native_pixmap_factory_caca.h",
-    "ozone_platform_caca.cc",
-    "ozone_platform_caca.h",
-    "scoped_caca_types.cc",
-    "scoped_caca_types.h",
-  ]
-
-  deps = [
-    "//base",
-    "//skia",
-    "//ui/events",
-    "//ui/events/ozone:events_ozone_layout",
-    "//ui/events/platform",
-    "//ui/gfx",
-    "//ui/gfx/geometry",
-    "//ui/ozone:ozone_base",
-    "//ui/ozone/common",
-    "//ui/platform_window",
-  ]
-
-  configs += [ ":libcaca" ]
-}
-
-pkg_config("libcaca") {
-  packages = [ "caca" ]
-}