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

chrome/browser/metrics/variations/BUILD.gn

 # Copyright 2015 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("//components/variations/service/generate_ui_string_overrider.gni")
 
-# GYP version: chrome/chrome_resources.gyp:chrome_ui_string_overrider_factory
 generate_ui_string_overrider("chrome_ui_string_overrider_factory") {
   inputs = [
     "$root_gen_dir/chrome/grit/chromium_strings.h",
     "$root_gen_dir/chrome/grit/generated_resources.h",
     "$root_gen_dir/chrome/grit/google_chrome_strings.h",
     "$root_gen_dir/components/strings/grit/components_chromium_strings.h",
     "$root_gen_dir/components/strings/grit/components_google_chrome_strings.h",
     "$root_gen_dir/components/strings/grit/components_strings.h",
   ]
   deps = [
     "//chrome/app:chromium_strings",
     "//chrome/app:generated_resources",
     "//chrome/app:google_chrome_strings",
     "//components/strings:components_chromium_strings",
     "//components/strings:components_google_chrome_strings",
     "//components/strings:components_strings",
   ]
   namespace = "chrome_variations"
   header_filename = "ui_string_overrider_factory.h"
   source_filename = "ui_string_overrider_factory.cc"
 }