No need in empty head panel on login page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/layouts/devise.html.haml

@@ -3,7 +3,6 @@
   = render "layouts/head"
   %body.ui_mars.login-page.application
     = render "layouts/broadcast"
-    = render "layouts/public_head_panel", title: ''
     .container.navless-container
       .content
         = render "layouts/flash"