Remove more libraries directives from server

pkg/analysis_server/lib/src/computer/computer_hover.dart

Index: pkg/analysis_server/lib/src/computer/computer_hover.dart
diff --git a/pkg/analysis_server/lib/src/computer/computer_hover.dart b/pkg/analysis_server/lib/src/computer/computer_hover.dart
index e04bea275b562f1eebfbe37aaa53f3247be7f00f..96b07f50bdcf85f44304a2a3d9d21b1cfe1effd5 100644
--- a/pkg/analysis_server/lib/src/computer/computer_hover.dart
+++ b/pkg/analysis_server/lib/src/computer/computer_hover.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 computer.hover;
-
 import 'package:analysis_server/protocol/protocol_generated.dart'
     show HoverInformation;
 import 'package:analysis_server/src/computer/computer_overrides.dart';