clarify functionality gap by to-do

src/repositories/ApiBasedRepository.ts

@@ -1,8 +1,6 @@
 import { GetterRepository } from "./GetterRepository";
 import { IEta, IOrderedStop, IRoute } from "../entities/entities";
 
-// TODO: implement
-
 interface ApiBasedRepositoryCache {
   etasForShuttleId: {
     [shuttleId: string]: IEta[],
@@ -39,6 +37,7 @@ export class ApiBasedRepository implements GetterRepository {
     return [];
   }
 
+  // TODO: migrate rest of logic over to this class
   public async getOrderedStopByRouteAndStopId(routeId: string, stopId: string): Promise<| null> {
     return null;
   }