Move the #require_ldap_enabled method to Groups::LdapGroupLinksController

It's only used here so there's no point having it in
ApplicationController!
Signed-off-by: Rémy Coutable <remy@rymai.me>

app/controllers/application_controller.rb

@@ -232,12 +232,6 @@ class ApplicationController < ActionController::Base
     end
   end
 
-  def require_ldap_enabled
-    unless Gitlab.config.ldap.enabled
-      render_404 and return
-    end
-  end
-
   def set_filters_params
     set_default_sort
 

app/controllers/groups/ldap_group_links_controller.rb

@@ -31,6 +31,12 @@ class Groups::LdapGroupLinksController < Groups::ApplicationController
 
   private
 
+  def require_ldap_enabled
+    unless Gitlab.config.ldap.enabled
+      render_404 and return
+    end
+  end
+
   def ldap_group_link_params
     params.require(:ldap_group_link).permit(:cn, :group_access, :provider)
   end