Remove more libraries directives from server

pkg/analysis_server/lib/src/services/search/search_engine_internal.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // 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 analysis_server.src.services.search.search_engine_internal;
-
 import 'dart:async';
 
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/visitor.dart';
 import 'package:analyzer/src/dart/element/ast_provider.dart';
 import 'package:analyzer/src/dart/element/element.dart';
@@ skipping 564 matching lines @@
       _addMatch(node, kind);
     }
   }
 
   void _addMatch(AstNode node, MatchKind kind) {
     bool isQualified = node.parent is Label;
     matches.add(new SearchMatchImpl(context, libraryUri, unitUri, kind,
         range.node(node), true, isQualified));
   }
 }