Codechange: Use CargoArray for linkgraph refresher. (#13165)

`uint capacities[NUM_CARGO]` looks a lot like CargoArray.

src/linkgraph/refresh.cpp

@@ -70,8 +70,6 @@ LinkRefresher::LinkRefresher(Vehicle *vehicle, HopSet *seen_hops, bool allow_mer
 	vehicle(vehicle), seen_hops(seen_hops), cargo(INVALID_CARGO), allow_merge(allow_merge),
 	is_full_loading(is_full_loading)
 {
-	memset(this->capacities, 0, sizeof(this->capacities));
-
 	/* Assemble list of capacities and set last loading stations to 0. */
 	for (Vehicle *v = this->vehicle; v != nullptr; v = v->Next()) {
 		this->refit_capacities.push_back(RefitDesc(v->cargo_type, v->cargo_cap, v->refit_cap));