Removing sponsors code.

Support new sponsor confirmation polling.
fixes #319

frontend/src/app/services/api.service.ts

@@ -77,6 +77,10 @@ export class ApiService {
     return this.httpClient.get<any[]>(this.apiBaseUrl + this.apiBasePath + '/api/v1/donations');
   }
 
+  checkDonation$(orderId: string): Observable<any[]> {
+    return this.httpClient.get<any[]>(this.apiBaseUrl + this.apiBasePath + '/api/v1/donations/check?order_id=' + orderId);
+  }
+
   getInitData$(): Observable<WebsocketResponse> {
     return this.httpClient.get<WebsocketResponse>(this.apiBaseUrl + this.apiBasePath + '/api/v1/init-data');
   }

frontend/src/app/services/state.service.ts

@@ -64,7 +64,6 @@ export class StateService {
   vbytesPerSecond$ = new ReplaySubject<number>(1);
   lastDifficultyAdjustment$ = new ReplaySubject<number>(1);
   gitCommit$ = new ReplaySubject<string>(1);
-  donationConfirmed$ = new Subject();
   loadingIndicators$ = new ReplaySubject<ILoadingIndicators>(1);
 
   live2Chart$ = new Subject<OptimizedMempoolStats>();

frontend/src/app/services/websocket.service.ts

@@ -126,10 +126,6 @@ export class WebsocketService {
     this.isTrackingTx = true;
   }
 
-  trackDonation(id: string) {
-    this.websocketSubject.next({ 'track-donation': id });
-  }
-
   stopTrackingTransaction() {
     if (!this.isTrackingTx) {
       return;
@@ -289,9 +285,5 @@ export class WebsocketService {
     if (response['git-commit']) {
       this.stateService.gitCommit$.next(response['git-commit']);
     }
-
-    if (response.donationConfirmed) {
-      this.stateService.donationConfirmed$.next(true);
-    }
   }
 }