Update IsAllowedGuestCheckoutObserver.php

Author: hungvt

app/code/Magento/Downloadable/Observer/IsAllowedGuestCheckoutObserver.php

@@ -43,8 +43,6 @@ public function execute(\Magento\Framework\Event\Observer $observer)
         $store = $observer->getEvent()->getStore();
         $result = $observer->getEvent()->getResult();
 
-        $result->setIsAllowed(true);
-
         if (!$this->_scopeConfig->isSetFlag(
             self::XML_PATH_DISABLE_GUEST_CHECKOUT,
             ScopeInterface::SCOPE_STORE,