Remove some more library directives

pkg/analysis_server/benchmark/integration/driver.dart

Index: pkg/analysis_server/benchmark/integration/driver.dart
diff --git a/pkg/analysis_server/benchmark/integration/driver.dart b/pkg/analysis_server/benchmark/integration/driver.dart
index d01b15226dbb4dd40ae183f83a4bad0882445887..505b5732be1a197e113b7ef9bd77a008044ae428 100644
--- a/pkg/analysis_server/benchmark/integration/driver.dart
+++ b/pkg/analysis_server/benchmark/integration/driver.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.driver;
-
 import 'dart:async';
 import 'dart:math' show max, sqrt;