Remove some more library directives

pkg/analysis_server/benchmark/integration/operation.dart

Index: pkg/analysis_server/benchmark/integration/operation.dart
diff --git a/pkg/analysis_server/benchmark/integration/operation.dart b/pkg/analysis_server/benchmark/integration/operation.dart
index 1ddcff836cc3dc5675f7bb4faf963e8ec414505d..bacb55e71a75f7d9ea1d06f11b39cba738e020b8 100644
--- a/pkg/analysis_server/benchmark/integration/operation.dart
+++ b/pkg/analysis_server/benchmark/integration/operation.dart
@@ -2,8 +2,6 @@
 // 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.operation;
-
 import 'dart:async';
 
 import 'package:analysis_server/protocol/protocol_generated.dart';