SWS-7: Finish "download" workflow template

Make it so the download workflow actually works and does things!

apps/web/src/app/archive-search/services/result-type.service.ts

 import {Injectable} from '@angular/core';
 import {ResultType} from "../model/result-type";
 import {BehaviorSubject, Observable} from "rxjs";
-import {HttpClient} from "@angular/common/http";
-import {EnvService} from "../../env/env.service";
 
 @Injectable({
   providedIn: 'root'
@@ -13,11 +11,7 @@ export class ResultTypeService {
   private _resultType: BehaviorSubject<ResultType> = new BehaviorSubject(this.resultType);
   public readonly resultType$: Observable<ResultType> = this._resultType.asObservable();
 
-  private serverAddress: string = '';
-
-  constructor(private http: HttpClient, private env: EnvService) {
-    this.serverAddress = env.apiUrl;
-  }
+  constructor() {}
 
   updateResultType(name: string): void {
     this.resultType = ResultType.getResultType(name);