Remove unused member variable.
Remove unused member variable.

svn path=/trunk/KDE/kdeedu/marble/; revision=944993

probonopd/marble,David-Gil/marble-dev,AndreiDuma/marble,rku/marble,Earthwings/marble,utkuaydin/marble,quannt24/marble,tucnak/marble,tzapzoor/marble,tzapzoor/marble,oberluz/marble,tzapzoor/marble,rku/marble,AndreiDuma/marble,AndreiDuma/marble,probonopd/marble,probonopd/marble,adraghici/marble,tzapzoor/marble,oberluz/marble,tucnak/marble,utkuaydin/marble,oberluz/marble,rku/marble,rku/marble,quannt24/marble,tzapzoor/marble,probonopd/marble,David-Gil/marble-dev,oberluz/marble,Earthwings/marble,tzapzoor/marble,tzapzoor/marble,AndreiDuma/marble,quannt24/marble,oberluz/marble,Earthwings/marble,quannt24/marble,David-Gil/marble-dev,David-Gil/marble-dev,tucnak/marble,probonopd/marble,rku/marble,AndreiDuma/marble,quannt24/marble,adraghici/marble,adraghici/marble,quannt24/marble,tucnak/marble,quannt24/marble,Earthwings/marble,adraghici/marble,Earthwings/marble,David-Gil/marble-dev,probonopd/marble,utkuaydin/marble,Earthwings/marble,adraghici/marble,David-Gil/marble-dev,utkuaydin/marble,adraghici/marble,utkuaydin/marble,tucnak/marble,tucnak/marble,AndreiDuma/marble,utkuaydin/marble,oberluz/marble,tzapzoor/marble,probonopd/marble,rku/marble,tucnak/marble