Remove old index and search implementations.

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

 // Copyright (c) 2014, 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.search_engine;
 
 import 'dart:async';
 
-import 'package:analysis_server/src/services/index/index.dart';
-import 'package:analysis_server/src/services/search/search_engine_internal.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/visitor.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/generated/engine.dart' show AnalysisContext;
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 /**
- * Returns a new [SearchEngine] instance based on the given [Index].
- */
-SearchEngine createSearchEngine(Index index) {
-  return new SearchEngineImpl(index);
-}
-
-/**
  * Instances of the enum [MatchKind] represent the kind of reference that was
  * found when a match represents a reference to an element.
  */
 class MatchKind {
   /**
    * A declaration of an element.
    */
   static const MatchKind DECLARATION = const MatchKind('DECLARATION');
 
   /**
@@ skipping 224 matching lines @@
     if (element is ElementImpl) {
       if (element.codeOffset != null &&
           element.codeOffset <= offset &&
           offset <= element.codeOffset + element.codeLength) {
         containingElement = element;
         super.visitElement(element);
       }
     }
   }
 }