clang-analyzer-deadcode.DeadStores

ever since 68e756de "n#657896 - Gradient
Transparencies and Muticolor Gradient fills" moved the use of nDmlANgle (to set
aGradient.Angle) from after the if/else to inside the else branch.  According
to vmiklos: "i guess it's just an oversight that the
'nDmlAngle = nShapeRotation;' is not removed in the 'if' branch."

Change-Id: I63e449e01a83415d988d6616388d724449997f39

oox/source/drawingml/fillproperties.cxx

@@ -377,7 +377,6 @@ void FillProperties::pushToPropMap( ShapePropertyMap& rPropMap,
                         aGradient.YOffset = getLimitedValue< sal_Int16, sal_Int32 >( nCenterY / PER_PERCENT, 30, 70 );
                         ::std::swap( aGradient.StartColor, aGradient.EndColor );
                         ::std::swap( nStartTrans, nEndTrans );
-                        nDmlAngle = nShapeRotation;
                     }
                     else
                     {