diff --git a/sql/src/main/java/io/crate/breaker/ConstSizeEstimator.java b/sql/src/main/java/io/crate/breaker/ConstSizeEstimator.java
index 5849d797edd3..f50fba3be7c4 100644
--- a/sql/src/main/java/io/crate/breaker/ConstSizeEstimator.java
+++ b/sql/src/main/java/io/crate/breaker/ConstSizeEstimator.java
@@ -42,18 +42,4 @@ public long estimateSize(@Nullable Object value) {
         }
         return size;
     }
-
-    @Override
-    public long estimateSizeDelta(@Nullable Object oldValue, @Nullable Object newValue) {
-        if (oldValue == null) {
-            if (newValue == null) {
-                return 0;
-            }
-            return size - 8;
-        }
-        if (newValue == null) {
-            return 8 - size;
-        }
-        return 0;
-    }
 }