chore(iot-hub): drop now-unused filter import from IotHubActionsService

ui-ngx/src/app/modules/home/components/iot-hub/iot-hub-actions.service.ts

@@ -17,7 +17,7 @@
 import { Injectable } from '@angular/core';
 import { MatDialog } from '@angular/material/dialog';
 import { Observable, of, EMPTY } from 'rxjs';
-import { filter, map, mergeMap } from 'rxjs/operators';
+import { map, mergeMap } from 'rxjs/operators';
 import { TranslateService } from '@ngx-translate/core';
 import { DialogService } from '@core/services/dialog.service';
 import { MpItemVersionView } from '@shared/models/iot-hub/iot-hub-version.models';