removing unnecessary code

Author: shroffk

app/display/thumbwheel/src/main/java/org/csstudio/display/widget/ThumbwheelWidgetRepresentationService.java

@@ -1,6 +1,5 @@
 package org.csstudio.display.widget;
 
-import org.csstudio.display.builder.model.Widget;
 import org.csstudio.display.builder.model.WidgetDescriptor;
 import org.csstudio.display.builder.representation.WidgetRepresentation;
 import org.csstudio.display.builder.representation.WidgetRepresentationFactory;
@@ -14,14 +13,6 @@ public class ThumbwheelWidgetRepresentationService implements WidgetRepresentati
     @SuppressWarnings({"unchecked", "rawtypes", "nls"})
     @Override
     public <TWP, TW> Map<WidgetDescriptor, WidgetRepresentationFactory<TWP, TW>> getWidgetRepresentationFactories() {
-        final WidgetDescriptor unknown_widget = new WidgetDescriptor(WidgetRepresentationFactory.UNKNOWN, null, WidgetRepresentationFactory.UNKNOWN, null, "Unknown Widget") {
-            @Override
-            public Widget createWidget() {
-                // Cannot create instance
-                return null;
-            }
-        };
-
         return Map.ofEntries(
                 entry(ThumbwheelWidget.WIDGET_DESCRIPTOR, () -> (WidgetRepresentation) new ThumbwheelWidgetRepresentation()));
     }