Remove references to enabling mutable datetime objects.

config/bootstrap.php

@@ -182,31 +182,27 @@
 });
 
 /*
- * You can set whether the ORM uses immutable or mutable Time types.
- * The default changed in 4.0 to immutable types. You can uncomment
- * below to switch back to mutable types.
- *
  * You can enable default locale format parsing by adding calls
  * to `useLocaleParser()`. This enables the automatic conversion of
  * locale specific date formats. For details see
  * @link https://book.cakephp.org/4/en/core-libraries/internationalization-and-localization.html#parsing-localized-datetime-data
  */
 // \Cake\Database\TypeFactory::build('time')
-//    ->useMutable();
+//    ->useLocaleParser();
 // \Cake\Database\TypeFactory::build('date')
-//    ->useMutable();
+//    ->useLocaleParser();
 // \Cake\Database\TypeFactory::build('datetime')
-//    ->useMutable();
+//    ->useLocaleParser();
 // \Cake\Database\TypeFactory::build('timestamp')
-//    ->useMutable();
+//    ->useLocaleParser();
 // \Cake\Database\TypeFactory::build('datetimefractional')
-//    ->useMutable();
+//    ->useLocaleParser();
 // \Cake\Database\TypeFactory::build('timestampfractional')
-//    ->useMutable();
+//    ->useLocaleParser();
 // \Cake\Database\TypeFactory::build('datetimetimezone')
-//    ->useMutable();
+//    ->useLocaleParser();
 // \Cake\Database\TypeFactory::build('timestamptimezone')
-//    ->useMutable();
+//    ->useLocaleParser();
 
 // There is no time-specific type in Cake
 TypeFactory::map('time', StringType::class);