Clean up the gyp build of standalone dart executable on Android.

runtime/bin/io_impl_sources_no_nss.gypi

Index: runtime/bin/io_impl_sources_no_nss.gypi
diff --git a/runtime/bin/io_impl_sources_no_nss.gypi b/runtime/bin/io_impl_sources_no_nss.gypi
deleted file mode 100644
index 3222272145837ae355cca59d74cd0c539e8f487f..0000000000000000000000000000000000000000
--- a/runtime/bin/io_impl_sources_no_nss.gypi
+++ /dev/null
@@ -1,45 +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 some C++ sources for the dart:io library.  The other
-# implementation files are in builtin_impl_sources.gypi.
-{
-  'sources': [
-    'common.cc',
-    'crypto.cc',
-    'crypto_android.cc',
-    'crypto_linux.cc',
-    'crypto_macos.cc',
-    'crypto_win.cc',
-    'eventhandler.cc',
-    'eventhandler.h',
-    'eventhandler_android.cc',
-    'eventhandler_linux.cc',
-    'eventhandler_linux.h',
-    'eventhandler_macos.cc',
-    'eventhandler_macos.h',
-    'eventhandler_win.cc',
-    'eventhandler_win.h',
-    'filter_dummy.cc',
-    'platform.cc',
-    'platform.h',
-    'platform_android.cc',
-    'platform_linux.cc',
-    'platform_macos.cc',
-    'platform_win.cc',
-    'process.cc',
-    'process.h',
-    'process_android.cc',
-    'process_linux.cc',
-    'process_macos.cc',
-    'process_win.cc',
-    'socket.cc',
-    'socket.h',
-    'socket_android.cc',
-    'socket_linux.cc',
-    'socket_macos.cc',
-    'socket_win.cc',
-    'secure_socket_dummy.cc',
-  ],
-}