MAGETWO-95651: Narrow number of top menu cache versions

Author: slopukhov

app/code/Magento/Theme/Block/Html/Topmenu.php

@@ -361,17 +361,6 @@ public function getIdentities()
         return $this->identities;
     }
 
-    /**
-     * Get cache key informative items
-     *
-     * @return array
-     * @since 100.1.0
-     */
-    public function getCacheKeyInfo()
-    {
-        return parent::getCacheKeyInfo();
-    }
-
     /**
      * Get tags array for saving cache
      *