branch-4.1: [opt](memory) Remove unused indexId field from CloudReplica #62080 (#62097)

Cherry-picked from #62080

Co-authored-by: Yongqiang YANG <yangyongqiang@selectdb.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: 3 people

fe/fe-core/src/main/java/org/apache/doris/cloud/catalog/CloudReplica.java

@@ -63,8 +63,6 @@ public class CloudReplica extends Replica implements GsonPostProcessable {
     private long tableId = -1;
     @SerializedName(value = "partitionId")
     private long partitionId = -1;
-    @SerializedName(value = "indexId")
-    private long indexId = -1;
     @SerializedName(value = "idx")
     private long idx = -1;
     // last time to get tablet stats
@@ -105,7 +103,6 @@ public CloudReplica(long replicaId, Long backendId, ReplicaState state, long ver
         super(replicaId, -1, state, version, schemaHash);
         this.tableId = tableId;
         this.partitionId = partitionId;
-        this.indexId = indexId;
         this.idx = idx;
     }
 
@@ -534,10 +531,6 @@ public long getPartitionId() {
         return partitionId;
     }
 
-    public long getIndexId() {
-        return indexId;
-    }
-
     public long getIdx() {
         return idx;
     }