remove(item: List) {
    this.list = this.listService.remover(this.list, item);
    localStorage.setItem('lists', JSON.stringify(this.list));
}

remover(listArray: List[], list: List) {
    const listArray1 = listArray.filter(item => item.id !== list.id);
    return listArray1;
}

<div>
    <li *ngFor="let item of list">
      <!-- {{checkItem(item)}} -->
      <div *ngIf="checkItem(item)">
        <input type="checkbox" class="stat" (click)="status(item)" [(checked)]="item.status" />
        <span class="task">{{item.task}}</span>
        <button class="listBtn" (click)="edit(item)">EDIT</button>
        <button class="listBtn" (click)="remove(item)">REMOVE</button>
      </div>
    </li>
  </div>