diff --git a/src/main/java/io/github/spannm/jackcess/impl/JetFormat.java b/src/main/java/io/github/spannm/jackcess/impl/JetFormat.java
index 2bec822..b767dbc 100644
--- a/src/main/java/io/github/spannm/jackcess/impl/JetFormat.java
+++ b/src/main/java/io/github/spannm/jackcess/impl/JetFormat.java
@@ -1593,10 +1593,6 @@ public boolean isSupportedDataType(DataType type) {
             return !V12_UNSUPP_TYPES.contains(type);
         }
 
-        @Override
-        public boolean isSupportedCalculatedDataType(DataType type) {
-            return false;
-        }
     }
 
     private static class Jet14Format extends Jet12Format {
@@ -1613,11 +1609,6 @@ protected ColumnImpl.SortOrder defineDefaultSortOrder() {
             return ColumnImpl.GENERAL_SORT_ORDER;
         }
 
-        @Override
-        protected byte[] definePropMapType() {
-            return PROPERTY_MAP_TYPES[0];
-        }
-
         @Override
         protected Map<String, Database.FileFormat> getPossibleFileFormats() {
             return PossibleFileFormats.POSSIBLE_VERSION_14;
diff --git a/src/test/java/io/github/spannm/jackcess/PropertyExpressionTest.java b/src/test/java/io/github/spannm/jackcess/PropertyExpressionTest.java
index 14a2604..e0228b2 100644
--- a/src/test/java/io/github/spannm/jackcess/PropertyExpressionTest.java
+++ b/src/test/java/io/github/spannm/jackcess/PropertyExpressionTest.java
@@ -362,10 +362,6 @@ private static void setTableProp(Table t, String propName,
     }
 
     private static final Function FOO = new FunctionSupport.Func0("FooFunc") {
-        @Override
-        public boolean isPure() {
-            return false;
-        }
 
         @Override
         protected Value eval0(EvalContext ctx) {