Remove GYP annotations from third_party GN files.

third_party/android_platform/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("//testing/test.gni")
 import("config.gni")
 
 if (current_toolchain == host_toolchain) {
-  # GYP: //third_party/android_platform/relocation_packer.gyp:android_lib_relocation_packer
   source_set("android_lib_relocation_packer") {
     deps = [
       "//third_party/elfutils:libelf",
     ]
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [ "//build/config/compiler:no_chromium_code" ]
     sources = [
       "bionic/tools/relocation_packer/src/debug.cc",
       "bionic/tools/relocation_packer/src/debug.h",
       "bionic/tools/relocation_packer/src/delta_encoder.cc",
       "bionic/tools/relocation_packer/src/delta_encoder.h",
       "bionic/tools/relocation_packer/src/elf_file.cc",
       "bionic/tools/relocation_packer/src/elf_file.h",
       "bionic/tools/relocation_packer/src/elf_traits.h",
       "bionic/tools/relocation_packer/src/packer.cc",
       "bionic/tools/relocation_packer/src/packer.h",
       "bionic/tools/relocation_packer/src/sleb128.cc",
       "bionic/tools/relocation_packer/src/sleb128.h",
     ]
   }
 
-  # GYP: //third_party/android_platform/relocation_packer.gyp:android_relocation_packer
   executable("android_relocation_packer") {
     deps = [
       ":android_lib_relocation_packer",
       "//build/config/sanitizers:deps",
       "//third_party/elfutils:libelf",
     ]
     sources = [
       "bionic/tools/relocation_packer/src/main.cc",
       "bionic/tools/relocation_packer/src/nativehelper/ScopedFd.h",
     ]
@@ skipping 10 matching lines @@
       "bionic/tools/relocation_packer/test_data/elf_file_unittest_relocs_mips32.so",
       "bionic/tools/relocation_packer/test_data/elf_file_unittest_relocs_mips32_packed.so",
       "bionic/tools/relocation_packer/test_data/elf_file_unittest_relocs_x64.so",
       "bionic/tools/relocation_packer/test_data/elf_file_unittest_relocs_x64_packed.so",
     ]
     outputs = [
       "$root_out_dir/{{source_file_part}}",
     ]
   }
 
-  # GYP: //third_party/android_platform/relocation_packer.gyp:android_relocation_packer_unittests
   test("android_relocation_packer_unittests") {
     deps = [
       ":android_lib_relocation_packer",
       ":copy_android_relocation_packer_test_data",
       "//testing/gtest",
     ]
     sources = [
       "bionic/tools/relocation_packer/src/debug_unittest.cc",
       "bionic/tools/relocation_packer/src/delta_encoder_unittest.cc",
       "bionic/tools/relocation_packer/src/elf_file_unittest.cc",
       "bionic/tools/relocation_packer/src/packer_unittest.cc",
       "bionic/tools/relocation_packer/src/run_all_unittests.cc",
       "bionic/tools/relocation_packer/src/sleb128_unittest.cc",
     ]
   }
 }
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 
   wrapper_script("stack_wrapper") {
     target = "//third_party/android_platform/development/scripts/stack"
   }
 }