diff --git a/src/app/+admin/admin-access-control/epeople-registry/eperson-form/eperson-form.component.ts b/src/app/+admin/admin-access-control/epeople-registry/eperson-form/eperson-form.component.ts
index 6838b8d803..0031271313 100644
--- a/src/app/+admin/admin-access-control/epeople-registry/eperson-form/eperson-form.component.ts
+++ b/src/app/+admin/admin-access-control/epeople-registry/eperson-form/eperson-form.component.ts
@@ -7,9 +7,9 @@ import {
   DynamicInputModel
 } from '@ng-dynamic-forms/core';
 import { TranslateService } from '@ngx-translate/core';
-import { Subscription, combineLatest, of, interval } from 'rxjs';
+import { Subscription, combineLatest, of } from 'rxjs';
 import { Observable } from 'rxjs/internal/Observable';
-import { flatMap, map, switchMap, take } from 'rxjs/operators';
+import { switchMap, take } from 'rxjs/operators';
 import { RestResponse } from '../../../../core/cache/response.models';
 import { PaginatedList } from '../../../../core/data/paginated-list';
 import { RemoteData } from '../../../../core/data/remote-data';
diff --git a/src/app/+admin/admin-sidebar/admin-sidebar.component.ts b/src/app/+admin/admin-sidebar/admin-sidebar.component.ts
index 114a3e903d..a2818b699a 100644
--- a/src/app/+admin/admin-sidebar/admin-sidebar.component.ts
+++ b/src/app/+admin/admin-sidebar/admin-sidebar.component.ts
@@ -2,7 +2,7 @@ import { Component, Injector, OnInit } from '@angular/core';
 import { NgbModal } from '@ng-bootstrap/ng-bootstrap';
 import { combineLatest as combineLatestObservable } from 'rxjs';
 import { Observable } from 'rxjs/internal/Observable';
-import { first, map, take } from 'rxjs/operators';
+import { first, map } from 'rxjs/operators';
 import { AuthService } from '../../core/auth/auth.service';
 import { slideHorizontal, slideSidebar } from '../../shared/animations/slide';
 import { CreateCollectionParentSelectorComponent } from '../../shared/dso-selector/modal-wrappers/create-collection-parent-selector/create-collection-parent-selector.component';
diff --git a/src/app/core/data/feature-authorization/authorization-data.service.ts b/src/app/core/data/feature-authorization/authorization-data.service.ts
index fa7eee0681..c75decccef 100644
--- a/src/app/core/data/feature-authorization/authorization-data.service.ts
+++ b/src/app/core/data/feature-authorization/authorization-data.service.ts
@@ -20,13 +20,12 @@ import { FollowLinkConfig } from '../../../shared/utils/follow-link-config.model
 import { Observable } from 'rxjs/internal/Observable';
 import { RemoteData } from '../remote-data';
 import { PaginatedList } from '../paginated-list';
-import { find, map, skipWhile, switchMap, tap } from 'rxjs/operators';
+import { find, map, switchMap, tap } from 'rxjs/operators';
 import { hasValue, isNotEmpty } from '../../../shared/empty.util';
 import { RequestParam } from '../../cache/models/request-param.model';
 import { AuthorizationSearchParams } from './authorization-search-params';
 import { addAuthenticatedUserUuidIfEmpty, addSiteObjectUrlIfEmpty } from './authorization-utils';
 import { FeatureID } from './feature-id';
-import { of } from 'rxjs/internal/observable/of';
 
 /**
  * A service to retrieve {@link Authorization}s from the REST API
diff --git a/src/app/shared/menu/menu.component.ts b/src/app/shared/menu/menu.component.ts
index 329fabf703..28e906c456 100644
--- a/src/app/shared/menu/menu.component.ts
+++ b/src/app/shared/menu/menu.component.ts
@@ -3,9 +3,9 @@ import { Observable } from 'rxjs/internal/Observable';
 import { MenuService } from './menu.service';
 import { MenuID } from './initial-menus-state';
 import { MenuSection } from './menu.reducer';
-import { distinctUntilChanged, filter, first, map, tap } from 'rxjs/operators';
+import { distinctUntilChanged, first, map } from 'rxjs/operators';
 import { GenericConstructor } from '../../core/shared/generic-constructor';
-import { hasNoValue, hasValue } from '../empty.util';
+import { hasValue } from '../empty.util';
 import { MenuSectionComponent } from './menu-section/menu-section.component';
 import { getComponentForMenu } from './menu-section.decorator';
 import { Subscription } from 'rxjs/internal/Subscription';