diff --git a/core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java b/core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java
index d9b9e2af954..7c7a847a525 100644
--- a/core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java
+++ b/core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java
@@ -138,8 +138,6 @@
 import java.util.regex.Pattern;
 import java.util.regex.PatternSyntaxException;
 
-import static java.time.temporal.ChronoField.*;
-
 import static org.apache.calcite.config.CalciteSystemProperty.FUNCTION_LEVEL_CACHE_MAX_SIZE;
 import static org.apache.calcite.linq4j.Nullness.castNonNull;
 import static org.apache.calcite.util.Static.RESOURCE;