diff --git a/server/src/main/java/org/opensearch/cluster/routing/allocation/AllocationService.java b/server/src/main/java/org/opensearch/cluster/routing/allocation/AllocationService.java
index 8e968b3d3b8e1..30696227bc993 100644
--- a/server/src/main/java/org/opensearch/cluster/routing/allocation/AllocationService.java
+++ b/server/src/main/java/org/opensearch/cluster/routing/allocation/AllocationService.java
@@ -58,17 +58,24 @@
 import org.opensearch.cluster.routing.allocation.decider.Decision;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.common.unit.TimeValue;
-import org.opensearch.core.common.util.CollectionUtils;
 import org.opensearch.gateway.GatewayAllocator;
 import org.opensearch.gateway.PriorityComparator;
 import org.opensearch.gateway.ShardsBatchGatewayAllocator;
 import org.opensearch.snapshots.SnapshotsInfoService;
 import org.opensearch.telemetry.metrics.noop.NoopMetricsRegistry;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Queue;
+import java.util.Set;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.Function;
 import java.util.stream.Collectors;