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

tools/android/md5sum/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/android/config.gni")
 import("//build/symlink.gni")
 
-# GYP: //tools/android/md5sum/md5sum.gyp:md5sum
 group("md5sum") {
   data_deps = [
     ":md5sum_prepare_dist($default_toolchain)",
     ":md5sum_bin_host($default_toolchain)",
   ]
 
   # TODO(cjhopman): Remove once group data_deps are fixed.
   deps = data_deps
 }
 
-# GYP: //tools/android/md5sum/md5sum.gyp:md5sum_bin_device (and md5sum_bin_host)
 executable("md5sum_bin") {
   sources = [
     "md5sum.cc",
   ]
   deps = [
     "//base",
     "//build/config/sanitizers:deps",
   ]
 
   if (is_android && use_order_profiling) {
     deps += [ "//tools/cygprofile" ]
   }
 }
 
 if (current_toolchain == default_toolchain) {
   import("//build/config/android/rules.gni")
 
-  # GYP: //tools/android/md5sum/md5sum.gyp:md5sum_stripped_device_bin
   create_native_executable_dist("md5sum_prepare_dist") {
     dist_dir = "$root_build_dir/md5sum_dist"
     binary = "$root_build_dir/md5sum_bin"
     deps = [
       ":md5sum_bin",
     ]
   }
 
-  # GYP: //tools/android/md5sum/md5sum.gyp:md5sum_bin_host
   binary_symlink("md5sum_bin_host") {
     binary_label = ":md5sum_bin($host_toolchain)"
     output_name = "md5sum_bin_host"
   }
 }