Pull request #1904: 无JIRA任务 修改类型描述

Merge in VISUAL/fineui from ~TELLER/fineui:master to master

* commit '22f13137a6a06765f68ed8ab9e70644292f06ecc':
  chore: 修改类型描述

typescript/core/controller/controller.broadcast.ts

@@ -5,5 +5,5 @@ export declare class BroadcastController extends Controller {
 
     send(name: string, ...args: any[]): void;
 
-    remove(name: string, fn: Function): this;
+    remove(name: string, fn?: Function): this;
 }