removed uneccesary variable

src/main/java/teetime/framework/pipe/ActivatingPipe.java

@@ -37,7 +37,6 @@ import teetime.framework.signal.ISignal;
  */
 public class ActivatingPipe<T> extends AbstractWaitingPipe<T> {
 
-	private final T element = null;
 	private IPipe<?> newPipe;
 	private final List<InputPort<?>> pipesToBeReplaced;
 	private final IPipe<T> oldPipe;