💄 remove code duplication

src/vs/base/browser/ui/list/listWidget.ts

@@ -14,7 +14,7 @@ import * as platform from 'vs/base/common/platform';
 import { EventType as TouchEventType } from 'vs/base/browser/touch';
 import { KeyCode } from 'vs/base/common/keyCodes';
 import { StandardKeyboardEvent } from 'vs/base/browser/keyboardEvent';
-import Event, { Emitter, EventBufferer, chain, mapEvent, fromCallback, createEmptyEvent, any } from 'vs/base/common/event';
+import Event, { Emitter, EventBufferer, chain, mapEvent, fromCallback, any } from 'vs/base/common/event';
 import { domEvent } from 'vs/base/browser/event';
 import { IDelegate, IRenderer, IListEvent, IListMouseEvent, IListContextMenuEvent } from './list';
 import { ListView, IListViewOptions } from './listView';
@@ -561,7 +561,7 @@ export class List<T> implements ISpliceable<T>, IDisposable {
 		return mapEvent(this.eventBufferer.wrapEvent(this.selection.onChange), e => this.toListEvent(e));
 	}
 
-	private _onContextMenu: Event<IListContextMenuEvent<T>> = createEmptyEvent();
+	private _onContextMenu: Event<IListContextMenuEvent<T>> = Event.None;
 	get onContextMenu(): Event<IListContextMenuEvent<T>> {
 		return this._onContextMenu;
 	}

src/vs/base/common/event.ts

@@ -491,7 +491,3 @@ export function buffer<T>(event: Event<T>, nextTick = false, buffer: T[] = []):
 
 	return emitter.event;
 }
-
-export function createEmptyEvent<T>(): Event<T> {
-	return (listener, thisArgs = null, disposables?) => ({ dispose: () => null });
-}
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