Remove old index and search implementations.

pkg/analysis_server/lib/src/services/index/index_store.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.index_store;
-
-import 'package:analysis_server/src/provisional/index/index_core.dart';
-import 'package:analysis_server/src/services/index/index.dart';
-import 'package:analyzer/dart/element/element.dart';
-import 'package:analyzer/src/generated/engine.dart';
-
-/**
- * A container with information computed by an index - relations between
- * elements.
- */
-abstract class InternalIndexStore extends IndexStore {
-  /**
-   * Answers index statistics.
-   */
-  String get statistics;
-
-  /**
-   * Notifies the index store that we are going to index the given [object].
-   *
-   * [context] - the [AnalysisContext] in which the [object] being indexed.
-   * [object] - the object being indexed.
-   *
-   * Returns `true` if the given [object] may be indexed, or `false` if
-   * belongs to a disposed [AnalysisContext], is not resolved completely, etc.
-   */
-  bool aboutToIndex(AnalysisContext context, Object object);
-
-  /**
-   * Notifies the index store that there was an error during the current
-   * indexing, and all the information recorded after the last
-   * [aboutToIndex] invocation must be discarded.
-   */
-  void cancelIndex();
-
-  /**
-   * Notifies the index store that the current object indexing is done.
-   *
-   * If this method is not invoked after corresponding [aboutToIndex]
-   * invocation, all recorded information may be lost.
-   */
-  void doneIndex();
-
-  /**
-   * Returns top-level [Element]s whose names satisfy to [nameFilter].
-   */
-  List<Element> getTopLevelDeclarations(ElementNameFilter nameFilter);
-
-  /**
-   * Records the declaration of the given top-level [element].
-   */
-  void recordTopLevelDeclaration(Element element);
-}