fixed compile error in filter in dynamic tree content provider

Issue-Ref: 4015
Issue-Url: https://af3-developer.fortiss.org/issues/4015

Signed-off-by: Johannes Eder <eder@fortiss.org>

org.fortiss.af3.component.ui/src/org/fortiss/af3/component/ui/simulatorfx/views/.ratings

 CustomSimulationFXViewBase.java a317294d59100c37bc71f13095ae5b4cccfcc779 GREEN
-DataStateTableViewFX.java 5e859a314697cf780a3a92b652d5defcf6cabf70 GREEN
+DataStateTableViewFX.java 226d370e9e41ebec72c2410c487a873c500e0ed6 GREEN
 GraphicalSimulationFXView.java c866c394e3fe951234112c1ddc69de79e94e9546 GREEN
 GraphicalStructureSimulationFXView.java dc7becae629b8704af3d9e593f2228c0667375c2 GREEN
 InputOutputTableFXView.java 60d363ba5fa16fd8892c42f9199769f47f4a45e3 GREEN

org.fortiss.af3.component.ui/src/org/fortiss/af3/component/ui/simulatorfx/views/DataStateTableViewFX.java

@@ -20,7 +20,6 @@ import static org.fortiss.af3.expression.language.evaluation.NoVal.NOVAL;
 import static org.fortiss.tooling.kernel.ui.util.MessageUtilsExtended.showErrorInUIThread;
 
 import java.util.Collection;
-import java.util.function.Predicate;
 
 import org.eclipse.core.runtime.IStatus;
 import org.fortiss.af3.component.model.behavior.common.DataStateVariable;
@@ -124,19 +123,6 @@ public final class DataStateTableViewFX extends SimulationFXViewBase {
 		protected boolean filter(Object element, String filterValue) {
 			return true;
 		}
-
-		/** {@inheritDoc} */
-		@Override
-		protected Predicate<Object> getFilterPredicate(String filterValue) {
-			// this override is needed, because super implementation does not
-			// call filter(Object, String) when filter value is null.
-			if(filterValue == null || "".equals(filterValue)) {
-				return (o) -> {
-					return filter(o, null);
-				};
-			}
-			return super.getFilterPredicate(filterValue);
-		}
 	}
 
 	/** {@link DynamicTreeUIProviderBase} for the library view. */