Remove GYP annotations from chrome, ui, tools GN files.

ui/gfx/x/BUILD.gn

 # 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/ui.gni")
 import("//ui/ozone/ozone.gni")
 
 assert(use_x11 || ozone_platform_x11)
 
-# GYP version: //ui/gfx/x/gfx_x11.gyp:gfx_x11
 component("x") {
   output_name = "gfx_x11"
 
   sources = [
     "../gfx_export.h",
     "x11_atom_cache.cc",
     "x11_atom_cache.h",
     "x11_connection.cc",
     "x11_connection.h",
     "x11_error_tracker.cc",
     "x11_error_tracker.h",
     "x11_switches.cc",
     "x11_switches.h",
     "x11_types.cc",
     "x11_types.h",
   ]
 
   defines = [ "GFX_IMPLEMENTATION" ]
 
   configs += [ "//build/config/linux:x11" ]
 
   deps = [
     "//base",
   ]
 }