Remove some more library directives

pkg/analysis_server/benchmark/perf/analysis_timing_tests.dart

Index: pkg/analysis_server/benchmark/perf/analysis_timing_tests.dart
diff --git a/pkg/analysis_server/benchmark/perf/analysis_timing_tests.dart b/pkg/analysis_server/benchmark/perf/analysis_timing_tests.dart
index abb6bb2817271b2f677119d8fcab7d85b4dd74aa..79330458007b0f602f915651f87c4c19fea8edea 100644
--- a/pkg/analysis_server/benchmark/perf/analysis_timing_tests.dart
+++ b/pkg/analysis_server/benchmark/perf/analysis_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';