Perform feature checks using method-missing in controller.

app/controllers/groups/hooks_controller.rb

@@ -2,7 +2,7 @@ class Groups::HooksController < Groups::ApplicationController
   # Authorize
   before_action :group
   before_action :authorize_admin_group!
-  before_action :ensure_feature_available!
+  before_action :check_group_webhooks_available!
 
   respond_to :html
 
@@ -69,10 +69,4 @@ class Groups::HooksController < Groups::ApplicationController
       :wiki_page_events
     )
   end
-
-  def ensure_feature_available!
-    unless @group.feature_available?(:group_webhooks)
-      render_404
-    end
-  end
 end