Remove unused import

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 'package:analysis_server/plugin/protocol/protocol.dart';
-
 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)'
+    print(
+        'Usage: dart benchmark_local.dart path_to_np8080 (an example ngdart project)'
         ' [benchmark_id]');
     return;
   }
   paths = new PathHolder(projectPath: args[0]);
   String id = args.length >= 2 ? args[1] : null;
   if (id == null) {
     for (String id in benchmarks.keys) {
       BenchmarkFunction benchmark = benchmarks[id];
       await benchmark(id);
     }
@@ skipping 20 matching lines @@
 1. Open 'packages/np8080'.
 2. Add an @Output to the class
 3. Measure the time to finish analysis.
 4. Rollback changes to the file and wait for analysis.
 5. Go to (2).
 ''';
   List<int> times = await new BenchmarkScenario().waitAnalyze_change_analyze(
       roots: [paths.packageNp8080],
       file: paths.editorDart,
       fileChange: new FileChange(
-          afterStr: 'showPreview = false;', insertStr: '@Output() EventEmitter<int> myEventEmitter;'),
+          afterStr: 'showPreview = false;',
+          insertStr: '@Output() EventEmitter<int> myEventEmitter;'),
       numOfRepeats: 10);
   printBenchmarkResults(id, description, times);
 }
 
 Future run_ng_change_html(String id) async {
   String description = r'''
 1. Open 'packages/np8080'.
 2. Change the contents of a mustache
 3. Measure the time to finish analysis.
 4. Rollback changes to the file and wait for analysis.
@@ skipping 39 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;
   }
 }