Fix 500 error on group.settings page

app/views/groups/edit.html.haml

@@ -26,7 +26,7 @@
                 .pull-right
                   = link_to 'Team', project_team_index_path(project), id: "edit_#{dom_id(project)}", class: "btn btn-small"
                   = link_to 'Edit', edit_project_path(project), id: "edit_#{dom_id(project)}", class: "btn btn-small"
-                  = link_to 'Remove', project, remove_project_message(project), method: :delete, class: "btn btn-small btn-remove"
+                  = link_to 'Remove', project, confirm: remove_project_message(project), method: :delete, class: "btn btn-small btn-remove"
             - if @group.projects.blank?
               %p.nothing_here_message This group has no projects yet