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

chrome/tools/build/win/syzygy/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("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/win/syzygy/syzygy.gni")
 
 assert(!syzygy_optimize || !is_syzyasan,
@@ skipping 53 matching lines @@
       if (is_official_build) {
         dest_dir = "$syzygy_dest_dir/instrumented"
         deps += [ ":chrome_child_dll_syzygy_copy" ]
       } else {
         dest_dir = syzygy_dest_dir
       }
     }
 
     if (is_official_build) {
       # Copies the uninstrumented chrome_child.dll.
-      # GYP version: chrome/chrome_syzygy.gyp:chrome_child_dll_syzygy_copy
       copy("chrome_child_dll_syzygy_copy") {
         sources = [
           "$root_out_dir/chrome_child.dll",
         ]
         outputs = [
           "$syzygy_dest_dir/{{source_file_part}}",
         ]
         deps = [
           "//chrome:chrome_child",
         ]
       }
     }
   }
 } else {
   # No syzygy. Generate dummy targets so other targets can unconditionally
   # depend on these without having to duplicate our conditions.
   group("chrome_dll_syzygy") {
   }
   if (is_multi_dll_chrome) {
     group("chrome_child_dll_syzygy") {
     }
   }
 }
 
 # Prevent unused variable warning for code paths where this is unused.
 assert(syzygy_dest_dir != "")