The \Magento\Sales\Controller\Order\Plugin\Authentication::beforeDispatch() method can be simplified by removing the unused $request argument

Issues
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1

This can be simplified to:

/**
 * Authenticate user
 *
 * @param \Magento\Framework\App\ActionInterface $subject
 * @return void
 */
public function beforeDispatch(\Magento\Framework\App\ActionInterface $subject)
{
	$loginUrl = $this->customerUrl->getLoginUrl();

	if (!$this->customerSession->authenticate($loginUrl)) {
		$subject->getActionFlag()->set('', $subject::FLAG_NO_DISPATCH, true);
	}
}

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