Revert "Fix '.container or .container-fluid should be the first child inside of a .navbar' issue"

This reverts commit 570594a4.

app/views/layouts/_head_panel.html.haml

 %header.navbar.navbar-fixed-top.navbar-gitlab{ class: nav_header_class }
-  .container
   .navbar-inner
+    .container
       %div.app_logo
         = link_to root_path, class: 'home', title: 'Dashboard', id: 'js-shortcuts-home', data: {toggle: 'tooltip', placement: 'bottom'} do
           = brand_header_logo