Remove some more library directives

pkg/analysis_server/benchmark/perf/completion_timing_tests.dart

Index: pkg/analysis_server/benchmark/perf/completion_timing_tests.dart
diff --git a/pkg/analysis_server/benchmark/perf/completion_timing_tests.dart b/pkg/analysis_server/benchmark/perf/completion_timing_tests.dart
index d841521eb21191449983e4b02c92cde458836e8b..6acd038f3581f7d82b56bac2d69e80f811ebddbf 100644
--- a/pkg/analysis_server/benchmark/perf/completion_timing_tests.dart
+++ b/pkg/analysis_server/benchmark/perf/completion_timing_tests.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.performance.analysis.timing;
-
 import 'dart:async';
 import 'dart:io';