Remote 6.x transport BWC Layer for `_shrink` (#33236)

The shrink action was renamed to `_resize` with the addition
or split. This bwc layer is unnecessary on 7.x since 6.latest will
always use the resize action.

server/src/main/java/org/elasticsearch/action/ActionModule.java

@@ -131,9 +131,7 @@ import org.elasticsearch.action.admin.indices.settings.put.UpdateSettingsAction;
 import org.elasticsearch.action.admin.indices.shards.IndicesShardStoresAction;
 import org.elasticsearch.action.admin.indices.shards.TransportIndicesShardStoresAction;
 import org.elasticsearch.action.admin.indices.shrink.ResizeAction;
-import org.elasticsearch.action.admin.indices.shrink.ShrinkAction;
 import org.elasticsearch.action.admin.indices.shrink.TransportResizeAction;
-import org.elasticsearch.action.admin.indices.shrink.TransportShrinkAction;
 import org.elasticsearch.action.admin.indices.stats.IndicesStatsAction;
 import org.elasticsearch.action.admin.indices.stats.TransportIndicesStatsAction;
 import org.elasticsearch.action.admin.indices.template.delete.DeleteIndexTemplateAction;
@@ -446,7 +444,6 @@ public class ActionModule extends AbstractModule {
         actions.register(IndicesSegmentsAction.INSTANCE, TransportIndicesSegmentsAction.class);
         actions.register(IndicesShardStoresAction.INSTANCE, TransportIndicesShardStoresAction.class);
         actions.register(CreateIndexAction.INSTANCE, TransportCreateIndexAction.class);
-        actions.register(ShrinkAction.INSTANCE, TransportShrinkAction.class);
         actions.register(ResizeAction.INSTANCE, TransportResizeAction.class);
         actions.register(RolloverAction.INSTANCE, TransportRolloverAction.class);
         actions.register(DeleteIndexAction.INSTANCE, TransportDeleteIndexAction.class);

server/src/main/java/org/elasticsearch/action/admin/indices/shrink/TransportShrinkAction.java

@@ -1,46 +0,0 @@
-/*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-package org.elasticsearch.action.admin.indices.shrink;
-
-import org.elasticsearch.action.support.ActionFilters;
-import org.elasticsearch.client.Client;
-import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.metadata.MetaDataCreateIndexService;
-import org.elasticsearch.cluster.service.ClusterService;
-import org.elasticsearch.common.inject.Inject;
-import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.threadpool.ThreadPool;
-import org.elasticsearch.transport.TransportService;
-
-/**
- * Main class to initiate shrinking an index into a new index
- * This class is only here for backwards compatibility. It will be replaced by
- * TransportResizeAction in 7.x once this is backported
- */
-public class TransportShrinkAction extends TransportResizeAction {
-
-    @Inject
-    public TransportShrinkAction(Settings settings, TransportService transportService, ClusterService clusterService,
-                                 ThreadPool threadPool, MetaDataCreateIndexService createIndexService,
-                                 ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver, Client client) {
-        super(settings, ShrinkAction.NAME, transportService, clusterService, threadPool, createIndexService, actionFilters,
-            indexNameExpressionResolver, client);
-    }
-}