LayerManager: remove unneeded attributes
LayerManager: remove unneeded attributes

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