Fix FindBug
diff --git a/src/main/java/com/yahoo/sketches/hive/quantiles/DoublesUnionState.java b/src/main/java/com/yahoo/sketches/hive/quantiles/DoublesUnionState.java
index 5c812e4..104b5d2 100644
--- a/src/main/java/com/yahoo/sketches/hive/quantiles/DoublesUnionState.java
+++ b/src/main/java/com/yahoo/sketches/hive/quantiles/DoublesUnionState.java
@@ -37,7 +37,6 @@
   void update(final byte[] serializedSketch) {
     final DoublesSketch incomingSketch = DoublesSketch.heapify(new NativeMemory(serializedSketch));
     if (union == null) {
-      DoublesUnion.builder();
       union = DoublesUnionBuilder.build(incomingSketch);
     } else {
       union.update(incomingSketch);