MAGETWO-38916: Add unit test coverage for \Magento\CurrencySymbol\Model\*

- removed unnecessary doc block tags

app/code/Magento/CurrencySymbol/Model/Observer.php

@@ -31,7 +31,6 @@ class Observer
      *
      * @param \Magento\Framework\Event\Observer $observer
      * @return $this
-     * @codeCoverageIgnore
      */
     public function currencyDisplayOptions(\Magento\Framework\Event\Observer $observer)
     {

app/code/Magento/CurrencySymbol/Model/System/Currencysymbol.php

@@ -285,7 +285,6 @@ class Currencysymbol
             )
         );
 
-        /* @var $storeModel \Magento\Store\Model\System\Store */
         $storeModel = $this->_systemStore;
         /** @var \Magento\Store\Model\Website $website */
         foreach ($storeModel->getWebsiteCollection() as $website) {