(svn r20860) -Cleanup: remove some unused functions and variables

src/saveload/engine_sl.cpp

@@ -137,11 +137,9 @@ static void Save_EIDS()
 
 static void Load_EIDS()
 {
-	int index;
-
 	_engine_mngr.Clear();
 
-	while ((index = SlIterateArray()) != -1) {
+	while (SlIterateArray() != -1) {
 		EngineIDMapping *eid = _engine_mngr.Append();
 		SlObject(eid, _engine_id_mapping_desc);
 	}

src/saveload/labelmaps_sl.cpp

@@ -109,9 +109,8 @@ static void Load_RAIL()
 	_railtype_list.Clear();
 
 	LabelObject lo;
-	int index;
 
-	while ((index = SlIterateArray()) != -1) {
+	while (SlIterateArray() != -1) {
 		SlObject(&lo, _label_object_desc);
 		*_railtype_list.Append() = (RailTypeLabel)lo.label;
 	}