diff --git a/npm/ng-packs/packages/core/src/lib/services/session-state.service.ts b/npm/ng-packs/packages/core/src/lib/services/session-state.service.ts
index 1d1c1e394d..be521f33c1 100644
--- a/npm/ng-packs/packages/core/src/lib/services/session-state.service.ts
+++ b/npm/ng-packs/packages/core/src/lib/services/session-state.service.ts
@@ -6,12 +6,6 @@ import { CurrentTenantDto } from '../proxy/volo/abp/asp-net-core/mvc/multi-tenan
 import { InternalStore } from '../utils/internal-store-utils';
 import { ConfigStateService } from './config-state.service';
 
-export interface SessionDetail {
-  openedTabCount: number;
-  lastExitTime: number;
-  remember: boolean;
-}
-
 @Injectable({
   providedIn: 'root',
 })