LDAP signin form moved to main signin-modal

- previously was a separate modal
- now is located on main modal, like email auth

public/views/index.ejs

@@ -192,7 +192,6 @@
         </div>
     </div>
     <%- include signin-modal %>
-    <%- include signin-ldap-modal %>
 
     <% if(useCDN) { %>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js" integrity="sha256-hVVnYaiADRTO2PzUGmuLJr8BLUSjGIZsDYGmIJLv2b8=" crossorigin="anonymous"></script>