Remove some more library directives

pkg/analysis_server/benchmark/perf/benchmark_angular.dart

 // Copyright (c) 2016, 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 server.performance.local;
-
 import 'dart:async';
 
 import 'benchmark_scenario.dart';
 import 'memory_tests.dart';
 
 main(List<String> args) async {
   int length = args.length;
   if (length < 1) {
     print(
         'Usage: dart benchmark_local.dart path_to_np8080 (an example ngdart project)'
@@ skipping 91 matching lines @@
   String editorHtml;
   String editorDart;
   String packageNp8080;
 
   PathHolder({String projectPath}) {
     editorHtml = '$projectPath/lib/editor/editor_component.html';
     editorDart = '$projectPath/lib/editor/editor_component.dart';
     packageNp8080 = projectPath;
   }
 }