removed border-bottom in pages/layout/top-nav navbar

pages/layout/top-nav.html

@@ -22,7 +22,7 @@ scratch. This page gets rid of all links and provides the needed markup only.
 <div class="wrapper">
 
   <!-- Navbar -->
-  <nav class="main-header navbar navbar-expand navbar-light navbar-white border-bottom">
+  <nav class="main-header navbar navbar-expand navbar-light navbar-white">
     <div class="container">
       <a href="index3.html" class="navbar-brand">
         <img src="../../dist/img/AdminLTELogo.png" alt="AdminLTE Logo" class="brand-image img-circle elevation-3"