remove redundant code

Author: Hoang Nguyen

index.html

@@ -168,7 +168,7 @@
                         <!--
                         <li>
                             <a href="portfolio.html">Portfolio
-                                <!--<b class="caret"></b> -->                            
+                                <b class="caret"></b>
                             </a>
                             
                             <ul class="dropdown-menu">