Remove broken root-config query
Remove broken root-config query

With the new alien-root-legacy one has to check if the TAlien class
is available instead of querying root-config (anyway it was bad design).

alisw/AliRoot,shahor02/AliRoot,coppedis/AliRoot,miranov25/AliRoot,alisw/AliRoot,alisw/AliRoot,miranov25/AliRoot,shahor02/AliRoot,alisw/AliRoot,miranov25/AliRoot,alisw/AliRoot,coppedis/AliRoot,miranov25/AliRoot,alisw/AliRoot,coppedis/AliRoot,shahor02/AliRoot,coppedis/AliRoot,shahor02/AliRoot,alisw/AliRoot,shahor02/AliRoot,shahor02/AliRoot,miranov25/AliRoot,coppedis/AliRoot,miranov25/AliRoot,coppedis/AliRoot,alisw/AliRoot,miranov25/AliRoot,shahor02/AliRoot,coppedis/AliRoot,miranov25/AliRoot,coppedis/AliRoot