ui: accessibility: remove -Wunused-function for Atk

build/config/linux/BUILD.gn

 # Copyright (c) 2013 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")
 import("//build/config/features.gni")
 import("//build/config/sysroot.gni")
 import("//build/config/ui.gni")
 import("//tools/generate_library_loader/generate_library_loader.gni")
 
@@ skipping 17 matching lines @@
                              "value") ]
   }
 
   # Set here because OS_CHROMEOS cannot be autodetected in build_config.h like
   # OS_LINUX and the like.
   if (is_chromeos) {
     defines = [ "OS_CHROMEOS" ]
   }
 }
 
-pkg_config("atk") {
-  packages = [ "atk" ]
-  atk_lib_dir = exec_script(pkg_config_script,
-                            [
-                              "--libdir",
-                              "atk",
-                            ],
-                            "string")
-  defines = [ "ATK_LIB_DIR=\"$atk_lib_dir\"" ]
-}
-
-# gn orders flags on a target before flags from configs. The default config
-# adds -Wall, and these flags have to be after -Wall -- so they need to come
-# from a config and can't be on the target directly.
-config("atk_warnings") {
-  # glib uses the pre-c++11 typedef-as-static_assert hack.
-  cflags = [ "-Wno-unused-local-typedef" ]
-}
-
 config("fontconfig") {
   libs = [ "fontconfig" ]
 }
 
 pkg_config("freetype2") {
   packages = [ "freetype2" ]
 }
 
 pkg_config("glib") {
   packages = [
@@ skipping 176 matching lines @@
 
   functions = gypi_values.libudev_functions
 }
 
 group("udev") {
   deps = [
     ":udev0_loader",
     ":udev1_loader",
   ]
 }