Get rid of all the library tags.

lib/src/backend/platform_selector/scanner.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 test.backend.platform_selector.scanner;
-
 import 'package:string_scanner/string_scanner.dart';
 
 import '../../utils.dart';
 import 'token.dart';
 
 /// A regular expression matching both whitespace and single-line comments.
 ///
 /// This will only match if consumes at least one character.
 final _whitespaceAndSingleLineComments =
     new RegExp(r"([ \t\n]+|//[^\n]*(\n|$))+");
@@ skipping 122 matching lines @@
     if (!_scanner.scan("/*")) return false;
 
     while (_scanner.scan(_multiLineCommentBody) || _multiLineComment()) {
       // Do nothing.
     }
     _scanner.expect("*/");
 
     return true;
   }
 }