Remove unused object and import from TransportClusterAllocationExplainAction (opensearch-project#4639)

Signed-off-by: Kunal Kotwani <[email protected]>

Signed-off-by: Kunal Kotwani <[email protected]>

Author: kotwanikunal

CHANGELOG.md

@@ -57,6 +57,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ### Removed
 - Remove deprecated code to add node name into log pattern of log4j property file ([#4568](https://github.com/opensearch-project/OpenSearch/pull/4568))
+- Unused object and import within TransportClusterAllocationExplainAction ([#4639](https://github.com/opensearch-project/OpenSearch/pull/4639))
 
 ### Fixed
 - `opensearch-service.bat start` and `opensearch-service.bat manager` failing to run ([#4289](https://github.com/opensearch-project/OpenSearch/pull/4289))
@@ -112,4 +113,4 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 
 [Unreleased]: https://github.com/opensearch-project/OpenSearch/compare/2.2.0...HEAD
-[2.x]: https://github.com/opensearch-project/OpenSearch/compare/2.2.0...2.x
+[2.x]: https://github.com/opensearch-project/OpenSearch/compare/2.2.0...2.x

server/src/main/java/org/opensearch/action/admin/cluster/allocation/TransportClusterAllocationExplainAction.java

@@ -50,7 +50,6 @@
 import org.opensearch.cluster.routing.allocation.RoutingAllocation;
 import org.opensearch.cluster.routing.allocation.RoutingAllocation.DebugMode;
 import org.opensearch.cluster.routing.allocation.ShardAllocationDecision;
-import org.opensearch.cluster.routing.allocation.allocator.ShardsAllocator;
 import org.opensearch.cluster.routing.allocation.decider.AllocationDeciders;
 import org.opensearch.cluster.service.ClusterService;
 import org.opensearch.common.inject.Inject;
@@ -77,7 +76,6 @@ public class TransportClusterAllocationExplainAction extends TransportClusterMan
     private final ClusterInfoService clusterInfoService;
     private final SnapshotsInfoService snapshotsInfoService;
     private final AllocationDeciders allocationDeciders;
-    private final ShardsAllocator shardAllocator;
     private final AllocationService allocationService;
 
     @Inject
@@ -90,7 +88,6 @@ public TransportClusterAllocationExplainAction(
         ClusterInfoService clusterInfoService,
         SnapshotsInfoService snapshotsInfoService,
         AllocationDeciders allocationDeciders,
-        ShardsAllocator shardAllocator,
         AllocationService allocationService
     ) {
         super(
@@ -105,7 +102,6 @@ public TransportClusterAllocationExplainAction(
         this.clusterInfoService = clusterInfoService;
         this.snapshotsInfoService = snapshotsInfoService;
         this.allocationDeciders = allocationDeciders;
-        this.shardAllocator = shardAllocator;
         this.allocationService = allocationService;
     }