diff --git a/src/vs/workbench/workbench.main.ts b/src/vs/workbench/workbench.main.ts
index a6c31adbe640ca6d71a3b393743dfa7463a77843..b1130436d6dbbe52d4787da2f4f16404d4e8f18f 100644
--- a/src/vs/workbench/workbench.main.ts
+++ b/src/vs/workbench/workbench.main.ts
@@ -71,8 +71,6 @@ import { IRequestService } from 'vs/platform/request/node/request';
 import { RequestService } from 'vs/platform/request/electron-browser/requestService';
 import { LifecycleService } from 'vs/platform/lifecycle/electron-browser/lifecycleService';
 import { ILifecycleService } from 'vs/platform/lifecycle/common/lifecycle';
-import { IDialogService } from 'vs/platform/dialogs/common/dialogs';
-import { DialogService } from 'vs/platform/dialogs/browser/dialogService';
 import { ILocalizationsService } from 'vs/platform/localizations/common/localizations';
 import { LocalizationsService } from 'vs/platform/localizations/electron-browser/localizationsService';
 import { ISharedProcessService, SharedProcessService } from 'vs/platform/ipc/electron-browser/sharedProcessService';
@@ -138,7 +136,6 @@ import 'vs/workbench/services/window/electron-browser/windowService';
 import 'vs/workbench/services/telemetry/electron-browser/telemetryService';
 import 'vs/workbench/services/configurationResolver/electron-browser/configurationResolverService';
 
-registerSingleton(IDialogService, DialogService, true);
 registerSingleton(IMenuService, MenuService, true);
 registerSingleton(IListService, ListService, true);
 registerSingleton(IOpenerService, OpenerService, true);