Remove library tags, they aren't needed

lib/src/runner/runtime_utils.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.
 
 /// JS runtime files utilities used by dartdevrun.
-library dev_compiler.src.runner.runtime_utils;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:path/path.dart';
 
 import '../compiler.dart' show defaultRuntimeFiles;
 import '../options.dart';
 import 'file_utils.dart';
 
@@ skipping 28 matching lines @@
   return files
     ..sort((File a, File b) {
       int pa = getPriorityIndex(a), pb = getPriorityIndex(b);
       return pa != pb ? (pa - pb) : a.path.compareTo(b.path);
     });
 }
 
 /// TODO(ochafik): Split / reuse [AbstractCompiler.getModuleName].
 String getMainModuleName(CompilerOptions options) =>
     basename(withoutExtension(options.inputs.single));