The \Magento\Multishipping\Controller\Checkout\Plugin::beforeExecute() method can be simplified by removing unused $subject argument

This can be simplified to:

/**
 * Disable multishipping
 *
 * @return void
 */
public function beforeExecute()
{
	$this->cart->getQuote()->setIsMultiShipping(0);
}

A trick: a «before» plugin can avoid declaration of unused last arguments if it needs not modify any argument

See also: