remove unnecessary and confusing line

XShapeGrouper.group returns a XShapeGroup
which is guaranteed to also be a XShape.
If it were not a XShape, this code would not even work
since the first assignment would not work,
since xShapeGroup is of type XShapeGroup.

Change-Id: Ic0d873229a1421c3dc94292d7449614a4b6140a3

wizards/com/sun/star/wizards/document/TimeStampControl.java

@@ -58,7 +58,6 @@ public class TimeStampControl extends DatabaseControl
         xShapes.add(oDateControl.xShape);
         xShapes.add(oTimeControl.xShape);
         xShapeGroup = _oFormHandler.xShapeGrouper.group(xShapes);
-        xShapeGroup = UnoRuntime.queryInterface(XShape.class, xShapeGroup);
         nreldatewidth = 1.0 / ((double) getSize().Width / (double) nDateWidth);
         nreltimewidth = 1.0 - nreldatewidth;
     }