fix test

Signed-off-by: Attila Mészáros <a_meszaros@apple.com>

Author: csviri

operator-framework/src/test/java/io/javaoperatorsdk/operator/baseapi/secondarytoprimaryreferencechange/TargetReconciler.java

@@ -48,7 +48,6 @@ public List<EventSource<?, TargetCustomResource>> prepareEventSources(
         InformerEventSourceConfiguration.from(
                 ConfigCustomResource.class, TargetCustomResource.class)
             .withSecondaryToPrimaryMapper(new ConfigToTargetMapper())
-            .withPrimaryToSecondaryMapper(p -> null)
             .build();
 
     var ies = new InformerEventSource<>(configuration, context);