CBonusSystemNode: get rid of non-const getBonusList

lib/HeroBonus.cpp

@@ -995,11 +995,6 @@ CBonusSystemNode::ENodeTypes CBonusSystemNode::getNodeType() const
 	return nodeType;
 }
 
-BonusList& CBonusSystemNode::getBonusList()
-{
-	return bonuses;
-}
-
 const BonusList& CBonusSystemNode::getBonusList() const
 {
 	return bonuses;

lib/HeroBonus.h

@@ -694,7 +694,6 @@ public:
 	void exportBonus(Bonus * b);
 	void exportBonuses();
 
-	BonusList &getBonusList();
 	const BonusList &getBonusList() const;
 	BonusList &getExportedBonusList();
 	CBonusSystemNode::ENodeTypes getNodeType() const;