fix build

src/vs/workbench/contrib/update/browser/update.ts

@@ -29,7 +29,6 @@ import { IHostService } from 'vs/workbench/services/host/browser/host';
 import { IProductService } from 'vs/platform/product/common/productService';
 import product from 'vs/platform/product/common/product';
 import { IStorageKeysSyncRegistryService } from 'vs/platform/userDataSync/common/storageKeys';
-import { IDialogService } from 'vs/platform/dialogs/common/dialogs';
 
 export const CONTEXT_UPDATE_STATE = new RawContextKey<string>('updateState', StateType.Idle);