overhauled registry

src/main/java/de/srsoftware/web4rail/tiles/Turnout.java

@@ -9,6 +9,7 @@ import java.util.concurrent.TimeoutException;
 import org.json.JSONObject;
 
 import de.srsoftware.tools.Tag;
+import de.srsoftware.web4rail.BaseClass;
 import de.srsoftware.web4rail.Command;
 import de.srsoftware.web4rail.Command.Reply;
 import de.srsoftware.web4rail.Device;
@@ -139,6 +140,11 @@ public abstract class Turnout extends Tile implements Device{
 		}		
 	}
 	
+	@Override
+	protected void removeChild(BaseClass child) {
+		// this class has no child elements		
+	}
+	
 	public State state() {
 		return state;
 	}