Remove more libraries directives from server

pkg/analysis_server/lib/src/operation/operation_queue.dart

Index: pkg/analysis_server/lib/src/operation/operation_queue.dart
diff --git a/pkg/analysis_server/lib/src/operation/operation_queue.dart b/pkg/analysis_server/lib/src/operation/operation_queue.dart
index 1687a4bc3209fdde14a7f59a7d712b52d8ac24e4..b163b94b0a3624434a5dc2107bd1026668a22110 100644
--- a/pkg/analysis_server/lib/src/operation/operation_queue.dart
+++ b/pkg/analysis_server/lib/src/operation/operation_queue.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 operation.queue;
-
 import 'dart:collection';
 
 import 'package:analysis_server/src/analysis_server.dart';