Remove package root target and support scripts

dart.gyp

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'most',
       'type': 'none',
       'dependencies': [
         'analysis_server',
         'create_sdk',
         'dart2js',
         'dartanalyzer',
         'dartdevc',
-        'packages',
         'runtime',
         'samples',
       ],
     },
     {
       # This is the target that is built on the VM build bots.  It
       # must depend on anything that is required by the VM test
       # suites.
       'target_name': 'runtime',
       'type': 'none',
       'dependencies': [
         'runtime/dart-runtime.gyp:dart',
         'runtime/dart-runtime.gyp:dart_bootstrap#host',
         'runtime/dart-runtime.gyp:run_vm_tests',
         'runtime/dart-runtime.gyp:process_test',
-        'packages',
         'runtime/dart-runtime.gyp:test_extension',
         'runtime/dart-runtime.gyp:sample_extension',
       ],
     },
     {
       # This is the target that is built on the VM build bots.  It
       # must depend on anything that is required by the VM test
       # suites.
       'target_name': 'runtime_precompiled',
       'type': 'none',
       'dependencies': [
         'runtime/dart-runtime.gyp:dart_precompiled_runtime',
         'runtime/dart-runtime.gyp:dart_bootstrap#host',
-        'packages',
       ],
     },
     {
       # This is the target that is built on the VM build bots.  It
       # must depend on anything that is required by the VM test
       # suites.
       'target_name': 'runtime_and_noopt',
       'type': 'none',
       'dependencies': [
         'runtime/dart-runtime.gyp:dart',
         'runtime/dart-runtime.gyp:dart_noopt',
         'runtime/dart-runtime.gyp:dart_bootstrap#host',
         'runtime/dart-runtime.gyp:run_vm_tests',
         'runtime/dart-runtime.gyp:process_test',
-        'packages',
         'runtime/dart-runtime.gyp:test_extension',
         'runtime/dart-runtime.gyp:sample_extension',
       ],
     },
     {
       'target_name': 'create_sdk',
       'type': 'none',
       'dependencies': [
         'create_sdk.gyp:create_sdk_internal',
       ],
@@ skipping 34 matching lines @@
       ],
     },
     {
       # This is the target that is built on the dart2js build bots.
       # It must depend on anything that is required by the dart2js
       # test suites.
       'target_name': 'dart2js_bot',
       'type': 'none',
       'dependencies': [
         'create_sdk',
-        'packages',
       ],
     },
     {
       'target_name': 'samples',
       'type': 'none',
       'dependencies': [],
       'conditions': [
         ['OS!="android"', {
            'dependencies': [
              'runtime/dart-runtime.gyp:sample_extension',
            ],
           },
         ],
       ]
     },
-    {
-      'target_name': 'packages',
-      'type': 'none',
-      'dependencies': [
-        'pkg/pkg.gyp:pkg_packages',
-      ],
-    },
   ],
 }