Get rid of all the library tags.

lib/src/ast.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 glob.ast;
-
 import 'package:path/path.dart' as p;
 import 'package:collection/collection.dart';
 
 import 'utils.dart';
 
 const _SEPARATOR = 0x2F; // "/"
 
 /// A node in the abstract syntax tree for a glob.
 abstract class AstNode {
   /// The cached regular expression that this AST was compiled into.
@@ skipping 346 matching lines @@
   LiteralNode(this.text, [this._context]);
 
   String _toRegExp() => regExpQuote(text);
 
   bool operator==(Object other) => other is LiteralNode && other.text == text;
 
   int get hashCode => text.hashCode;
 
   String toString() => text;
 }