Fix test

Author: rowleya

SpiNNaker-front-end/src/test/java/uk/ac/manchester/spinnaker/front_end/TestFrontEnd.java

@@ -181,14 +181,9 @@ void testAdvancedDSE() throws Exception {
 			CommandLineInterface.fastFactory = (m, g, r,
 					db) -> new FastExecuteDataSpecification(m, g, r, null) {
 						@Override
-						public void loadCores() {
+						public void loadCores(List<Gather> gatherers) {
 							called.setValue("mon");
 						}
-
-						@Override
-						protected void buildMaps(List<Gather> gatherers) {
-							assertEquals(g, gatherers);
-						}
 					};
 
 			var msg = tapSystemErrNormalized(() -> {