Minor optimization

Signed-off-by: Sandesh Kumar <[email protected]>

server/src/main/java/org/opensearch/search/aggregations/bucket/terms/GlobalOrdinalsStringTermsAggregator.java

@@ -433,7 +433,7 @@ public LeafBucketCollector getLeafCollector(LeafReaderContext ctx, LeafBucketCol
             LeafBucketCollector termDocFreqCollector = this.termDocFreqCollector(
                 ctx,
                 segmentOrds,
-                (ord, docCount) -> incrementBucketDocCount(collectionStrategy.globalOrdToBucketOrd(0, mapping.applyAsLong(ord)), docCount)
+                (ord, docCount) -> incrementBucketDocCount(mapping.applyAsLong(ord), docCount)
             );
             if (termDocFreqCollector != null) {
                 return termDocFreqCollector;