get rid of unecessary loop and change comment

followup to 764752f5d85cb7c86ad21340dfdda4b62754790c

Change-Id: Ib35b57b01ccf752c4696d6e7849629bd22a9e91a
diff --git a/sc/source/filter/oox/worksheethelper.cxx b/sc/source/filter/oox/worksheethelper.cxx
index 48dc7d6..8563048 100644
--- a/sc/source/filter/oox/worksheethelper.cxx
+++ b/sc/source/filter/oox/worksheethelper.cxx
@@ -1223,17 +1223,9 @@ void WorksheetGlobals::convertRows( OutlineLevelVec& orRowLevels,
    sal_Int32 nHeight = getUnitConverter().scaleToMm100( fHeight, UNIT_POINT );
    if( nHeight > 0 )
    {
        /*  Get all rows that have custom height inside the passed row model.
            If the model has the custom height flag set, all its rows have
            custom height, otherwise get all rows specified in the class member
            maManualRowHeights that are inside the passed row model. */
        ValueRangeVector aManualRows;
        aManualRows.push_back( rRowRange );
        for( ValueRangeVector::const_iterator aIt = aManualRows.begin(), aEnd = aManualRows.end(); aIt != aEnd; ++aIt )
        {
            PropertySet aPropSet( getRows( *aIt ) );
            aPropSet.setProperty( PROP_Height, nHeight );
        }
        /* always import the row height, ensures better layout */
        PropertySet aPropSet( getRows( rRowRange ) );
        aPropSet.setProperty( PROP_Height, nHeight );
    }

    // hidden rows: TODO: #108683# hide rows later?