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

chrome/renderer/leak_detector/BUILD.gn

 # 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.
 
 if (is_chromeos) {
-  # GYP version: chrome/chrome_renderer.gypi:chrome_renderer_leak_detector_sources
   source_set("leak_detector") {
     sources = [
       "leak_detector_remote_client.cc",
       "leak_detector_remote_client.h",
     ]
     deps = [
       "//components/metrics/leak_detector:interfaces",
       "//components/metrics/leak_detector:leak_detector",
       "//components/metrics/proto:proto",
       "//services/shell/public/cpp",
     ]
   }
 }