Remove unnecessary friend declaration.
Remove unnecessary friend declaration.

svn path=/trunk/KDE/kdeedu/marble/; revision=1012619

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