Remove SearchEngine.searchElementDeclarations().

pkg/analysis_server/lib/src/services/search/search_engine_internal2.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 services.src.search.search_engine2;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/correction/source_range.dart';
 import 'package:analysis_server/src/services/index2/index2.dart';
@@ skipping 16 matching lines @@
 
   SearchEngineImpl2(this.context, this._index);
 
   @override
   Future<List<SearchMatch>> searchAllSubtypes(ClassElement type) {
     // TODO: implement searchAllSubtypes
     throw new UnimplementedError();
   }
 
   @override
-  Future<List<SearchMatch>> searchElementDeclarations(String name) {
-    // TODO: implement searchElementDeclarations
-    throw new UnimplementedError();
-  }
-
-  @override
   Future<List<SearchMatch>> searchMemberDeclarations(String name) {
     // TODO: implement searchMemberDeclarations
     throw new UnimplementedError();
   }
 
   @override
   Future<List<SearchMatch>> searchMemberReferences(String name) {
     // TODO: implement searchMemberReferences
     throw new UnimplementedError();
   }
@@ skipping 293 matching lines @@
       _addMatch(node, kind);
     }
   }
 
   void _addMatch(AstNode node, MatchKind kind) {
     bool isQualified = node is SimpleIdentifier && node.isQualified;
     matches.add(new SearchMatch(context, libraryUri, unitUri, kind,
         rangeNode(node), true, isQualified));
   }
 }