laravel eloquent without relation

1$books = Book::without('author')->get();

1For example, a blog post may have an infinite number of comments. And a single
2comment belongs to only a single post  
3
4class Post extends Model
5{
6    public function comments()
7    {
8        return $this->hasMany('App\Models\Comment');
9    }
10}
11
12class Comment extends Model
13{
14    public function post()
15    {
16        return $this->belongsTo('App\Models\Post');
17    }
18}

1$movies = Movie::whereHas('director', function($q) {
2    $q->where('name', 'great');
3})->get();
4