Remove _unfreeze API endpoint in 9.0

docs/changelog/114490.yaml

@@ -0,0 +1,12 @@
+pr: 114490
+summary: Remove `_unfreeze` API endpoint in 9.0
+area: CRUD
+type: breaking
+issues: []
+breaking:
+  title: Remove `_unfreeze` API endpoint in 9.0
+  area: CRUD
+  details: Please describe the details of this change for the release notes. You can
+    use asciidoc.
+  impact: Please describe the impact of this change to users
+  notable: false

x-pack/plugin/frozen-indices/src/main/java/org/elasticsearch/xpack/frozen/FrozenIndices.java

@@ -8,36 +8,22 @@
 
 import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionResponse;
-import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
-import org.elasticsearch.common.settings.ClusterSettings;
-import org.elasticsearch.common.settings.IndexScopedSettings;
 import org.elasticsearch.common.settings.Setting;
-import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.common.settings.SettingsFilter;
-import org.elasticsearch.features.NodeFeature;
 import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.index.engine.EngineFactory;
 import org.elasticsearch.index.engine.frozen.FrozenEngine;
 import org.elasticsearch.plugins.ActionPlugin;
 import org.elasticsearch.plugins.EnginePlugin;
 import org.elasticsearch.plugins.Plugin;
-import org.elasticsearch.rest.RestController;
-import org.elasticsearch.rest.RestHandler;
 import org.elasticsearch.xpack.core.action.XPackInfoFeatureAction;
 import org.elasticsearch.xpack.core.action.XPackUsageFeatureAction;
 import org.elasticsearch.xpack.core.frozen.action.FreezeIndexAction;
 import org.elasticsearch.xpack.frozen.action.TransportFreezeIndexAction;
-import org.elasticsearch.xpack.frozen.rest.action.RestFreezeIndexAction;
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
-import java.util.function.Predicate;
-import java.util.function.Supplier;
 
 public class FrozenIndices extends Plugin implements ActionPlugin, EnginePlugin {
 
@@ -63,19 +49,4 @@ public List<Setting<?>> getSettings() {
         actions.add(new ActionHandler<>(FreezeIndexAction.INSTANCE, TransportFreezeIndexAction.class));
         return actions;
     }
-
-    @Override
-    public List<RestHandler> getRestHandlers(
-        Settings settings,
-        NamedWriteableRegistry namedWriteableRegistry,
-        RestController restController,
-        ClusterSettings clusterSettings,
-        IndexScopedSettings indexScopedSettings,
-        SettingsFilter settingsFilter,
-        IndexNameExpressionResolver indexNameExpressionResolver,
-        Supplier<DiscoveryNodes> nodesInCluster,
-        Predicate<NodeFeature> clusterSupportsFeature
-    ) {
-        return Collections.singletonList(new RestFreezeIndexAction());
-    }
 }