Fixed linting errors

src/app/services/baw-api/baw-api.service.ts

@@ -19,7 +19,7 @@ import { CacheSettings, CACHE_SETTINGS } from "@services/cache/cache-settings";
 import { API_ROOT } from "@services/config/config.tokens";
 import { ToastrService } from "ngx-toastr";
 import { Observable, identity, iif, of, throwError } from "rxjs";
-import { catchError, concatMap, map, mergeMap, switchMap, tap } from "rxjs/operators";
+import { catchError, concatMap, map, switchMap, tap } from "rxjs/operators";
 import { IS_SERVER_PLATFORM } from "src/app/app.helper";
 import { BawSessionService } from "./baw-session.service";