vcmi: remove unused variables from lib/rmg

lib/rmg/ObjectManager.cpp

@@ -241,7 +241,6 @@ bool ObjectManager::createRequiredObjects()
 	for(const auto & object : requiredObjects)
 	{
 		auto * obj = object.first;
-		int3 pos;
 		rmg::Object rmgObject(*obj);
 		rmgObject.setTemplate(zone.getTerrainType());
 		bool guarded = addGuard(rmgObject, object.second, (obj->ID == Obj::MONOLITH_TWO_WAY));
@@ -278,7 +277,6 @@ bool ObjectManager::createRequiredObjects()
 	for(const auto & object : closeObjects)
 	{
 		auto * obj = object.first;
-		int3 pos;
 		auto possibleArea = zone.areaPossible();
 		rmg::Object rmgObject(*obj);
 		rmgObject.setTemplate(zone.getTerrainType());

lib/rmg/TreasurePlacer.cpp

@@ -736,7 +736,6 @@ void TreasurePlacer::createTreasures(ObjectManager & manager)
 			if(guarded)
 				guarded = manager.addGuard(rmgObject, value);
 			
-			int3 pos;
 			auto possibleArea = zone.areaPossible();
 			
 			auto path = rmg::Path::invalid();