laravel查询构建器删除where子句

Question

我在查询生成器（Laravel 5.6）中有whereIn

$data->whereIn('field1', [1,2,3])->whereIn('field2', [4,5,6])->whereIn('field3', [8,9,10]);
....
$some_count = clone $data;
$result = $data->get();
$count_result = $some_count->count(); <-- need without one of whereIn

现在，我需要在不使用whereIn之一的情况下执行count（），例如“ whereIn（'field2'，[4,5,6]）”。如何从$ some_count中删除此子句？