Cleanup: remove package "analyzer2dart".

pkg/analyzer2dart/lib/src/closed_world.dart

-// Copyright (c) 2014, 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 analyzer2dart.closedWorld;
-
-import 'dart:collection';
-
-import 'package:analyzer/analyzer.dart';
-import 'package:analyzer/src/generated/element.dart';
-import 'package:analyzer/src/generated/resolver.dart';
-
-/**
- * Container for the elements and AST nodes which have been determined by
- * tree shaking to be reachable by the program being compiled.
- */
-class ClosedWorld {
-  /// The core types of this world.
-  final TypeProvider typeProvider;
-
-  /// Returns the main function of this closed world compilation.
-  final FunctionElement mainFunction;
-
-  // TODO(paulberry): is it a problem to hold on to all the AST's for the
-  // duration of tree shaking & CPS generation?
-
-  /**
-   * Methods, toplevel functions, etc. that are reachable.
-   */
-  Map<ExecutableElement, Declaration> executableElements =
-      new HashMap<ExecutableElement, Declaration>();
-
-  /**
-   * Fields that are reachable.
-   */
-  Map<FieldElement, VariableDeclaration> fields =
-      new HashMap<FieldElement, VariableDeclaration>();
-
-  /**
-   * Top-level variables that are reachable.
-   */
-  // TODO(johnniwinther): Is there value in splitting fields and top-level
-  // variables?
-  Map<TopLevelVariableElement, VariableDeclaration> variables =
-      new HashMap<TopLevelVariableElement, VariableDeclaration>();
-
-  /**
-   * Classes that are instantiated from reachable code.
-   *
-   * TODO(paulberry): Also keep track of classes that are reachable but not
-   * instantiated (because they are extended or mixed in)
-   */
-  Map<ClassElement, ClassDeclaration> instantiatedClasses =
-      new HashMap<ClassElement, ClassDeclaration>();
-
-  ClosedWorld(this.typeProvider, this.mainFunction);
-}