[Backport 2.10] Remove custom-codecs plugin

CHANGELOG.md

@@ -119,7 +119,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [Remote Store] Add support for Remote Translog Store stats in `_remotestore/stats/` API ([#9263](https://github.com/opensearch-project/OpenSearch/pull/9263))
 - Removing the vec file extension from INDEX_STORE_HYBRID_NIO_EXTENSIONS, to ensure the no performance degradation for vector search via Lucene Engine.([#9528](https://github.com/opensearch-project/OpenSearch/pull/9528)))
 - Cleanup Unreferenced file on segment merge failure ([#9503](https://github.com/opensearch-project/OpenSearch/pull/9503))
-- Move ZStd to a plugin ([#9658](https://github.com/opensearch-project/OpenSearch/pull/9658))
+- Move zstd compression codec to external custom-codecs repository ([#9422](https://github.com/opensearch-project/OpenSearch/issues/9422])
 - [Remote Store] Add support for Remote Translog Store upload stats in `_nodes/stats/` API ([#8908](https://github.com/opensearch-project/OpenSearch/pull/8908))
 - [Remote Store] Removing feature flag to mark feature GA ([#9761](https://github.com/opensearch-project/OpenSearch/pull/9761))
 

modules/reindex/build.gradle

@@ -69,7 +69,6 @@ dependencies {
   testImplementation project(':modules:transport-netty4')
   // for parent/child testing
   testImplementation project(':modules:parent-join')
-  testImplementation project(':plugins:custom-codecs')
 }
 
 restResources {
@@ -96,5 +95,4 @@ forbiddenPatterns {
 tasks.named("bundlePlugin").configure {
   dependsOn("copyParentJoinMetadata")
   dependsOn("copyTransportNetty4Metadata")
-  dependsOn("copyCustomCodecsMetadata")
 }

modules/reindex/src/internalClusterTest/java/org/opensearch/index/codec/MultiCodecReindexIT.java

@@ -15,7 +15,6 @@
 import org.opensearch.action.support.ActiveShardCount;
 import org.opensearch.cluster.metadata.IndexMetadata;
 import org.opensearch.common.settings.Settings;
-import org.opensearch.index.codec.customcodecs.CustomCodecPlugin;
 import org.opensearch.index.engine.Segment;
 import org.opensearch.index.reindex.BulkByScrollResponse;
 import org.opensearch.index.reindex.ReindexAction;
@@ -47,7 +46,7 @@ public class MultiCodecReindexIT extends ReindexTestCase {
 
     @Override
     protected Collection<Class<? extends Plugin>> nodePlugins() {
-        return List.of(CustomCodecPlugin.class, ReindexPlugin.class);
+        return List.of(ReindexPlugin.class);
     }
 
     public void testReindexingMultipleCodecs() throws InterruptedException, ExecutionException {
@@ -57,10 +56,6 @@ public void testReindexingMultipleCodecs() throws InterruptedException, Executio
             "BEST_COMPRESSION",
             "zlib",
             "BEST_COMPRESSION",
-            "zstd_no_dict",
-            "ZSTD_NO_DICT",
-            "zstd",
-            "ZSTD",
             "default",
             "BEST_SPEED",
             "lz4",