util.ts
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
export function removeListItem<T>(list: T[], el: T): void {
const index = list.indexOf(el);
if (index > -1) list.splice(index, 1);
}