Chain::removeLetter

public function removeLetter($letterId)
{
	$list = [];
	foreach ($this->letters as $letter)
	{
		if ($letter->getId() == $letterId)
		{
			$this->removeLetterList[] = $letterId;
			continue;
		}

		$list[] = $letter;
	}
	$this->letters = $list;
	$this->sort();

	return $this;
}