Removed circ dependency after merge with main

src/app/core/shared/operators.ts

@@ -1,4 +1,4 @@
-import { combineLatest as observableCombineLatest, Observable, of as observableOf } from 'rxjs';
+import { combineLatest as observableCombineLatest, Observable } from 'rxjs';
 import { debounceTime, filter, find, map, switchMap, take, takeWhile } from 'rxjs/operators';
 import { hasNoValue, hasValue, hasValueOperator, isNotEmpty } from '../../shared/empty.util';
 import { SearchResult } from '../../shared/search/models/search-result.model';
@@ -9,9 +9,6 @@ import { MetadataSchema } from '../metadata/metadata-schema.model';
 import { BrowseDefinition } from './browse-definition.model';
 import { DSpaceObject } from './dspace-object.model';
 import { InjectionToken } from '@angular/core';
-import { Bitstream } from './bitstream.model';
-import { FeatureID } from '../data/feature-authorization/feature-id';
-import { AuthorizationDataService } from '../data/feature-authorization/authorization-data.service';
 
 export const DEBOUNCE_TIME_OPERATOR = new InjectionToken<<T>(dueTime: number) => (source: Observable<T>) => Observable<T>>('debounceTime', {
   providedIn: 'root',
@@ -225,20 +222,3 @@ export const metadataFieldsToString = () =>
       })
     );
 
-/**
- * Operator to check if the given bitstream is downloadable
- */
-export const getDownloadableBitstream = (authService: AuthorizationDataService) =>
-  (source: Observable<Bitstream>): Observable<Bitstream | null> =>
-    source.pipe(
-      switchMap((bit: Bitstream) => {
-        if (hasValue(bit)) {
-          return authService.isAuthorized(FeatureID.CanDownload, bit.self).pipe(
-            map((canDownload: boolean) => {
-              return canDownload ? bit : null;
-            }));
-        } else {
-          return observableOf(null);
-        }
-      })
-    );