Bootloader initialization cleanup.

lib/src/plugin/plugin_config_processor_plugin.dart

-// Copyright (c) 2015, 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.
-
-library analyzer_cli.src.plugin.plugin_config_processor;
-
-import 'package:analyzer/plugin/options.dart';
-import 'package:analyzer/src/plugin/plugin_configuration.dart';
-import 'package:plugin/plugin.dart';
-
-/// A plugin that registers an extension to process plugin configurations
-/// as defined in .`analysis options`.
-class PluginConfigProcessorPlugin implements Plugin {
-  /// The unique identifier of this plugin.
-  static const String UNIQUE_IDENTIFIER = 'plugin_config_processor.core';
-
-  final PluginConfigOptionsProcessor _optionProcessor;
-
-  PluginConfigProcessorPlugin([ErrorHandler handler])
-      : _optionProcessor = new PluginConfigOptionsProcessor(handler);
-
-  PluginConfig get pluginConfig => _optionProcessor.config;
-
-  @override
-  String get uniqueIdentifier => UNIQUE_IDENTIFIER;
-
-  @override
-  void registerExtensionPoints(RegisterExtensionPoint registerExtensionPoint) {
-    // There are no extension points.
-  }
-
-  @override
-  void registerExtensions(RegisterExtension registerExtension) {
-    registerExtension(OPTIONS_PROCESSOR_EXTENSION_POINT_ID, _optionProcessor);
-  }
-}