[infra] Translate _sources.gypi files to _sources.gni files

runtime/bin/io_sources.gypi

Index: runtime/bin/io_sources.gypi
diff --git a/runtime/bin/io_sources.gypi b/runtime/bin/io_sources.gypi
deleted file mode 100644
index 24bc72e7c35e549d8866e2f7b4d9b86204f5e380..0000000000000000000000000000000000000000
--- a/runtime/bin/io_sources.gypi
+++ /dev/null
@@ -1,22 +0,0 @@
-# Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-# for details. All rights reserved. Use of this source code is governed by a
-# BSD-style license that can be found in the LICENSE file.
-
-# This file contains all sources for the dart:io library.
-{
-  'sources': [
-    'common_patch.dart',
-    'directory_patch.dart',
-    'eventhandler_patch.dart',
-    'file_patch.dart',
-    'file_system_entity_patch.dart',
-    'filter_patch.dart',
-    'io_service_patch.dart',
-    'platform_patch.dart',
-    'process_patch.dart',
-    'socket_patch.dart',
-    'stdio_patch.dart',
-    'secure_socket_patch.dart',
-    'sync_socket_patch.dart',
-  ],
-}