Remove deprecated set! & def-setting! macros

modules/feature/lookup/autoload/lookup.el

@@ -60,12 +60,6 @@ Otherwise, these properties are available to be set:
                            (add-hook 'xref-backend-functions xref-backend nil t))))))
              (add-hook hook fn))))))
 
-;; FIXME obsolete :lookup
-;;;###autoload
-(def-setting! :lookup (modes &rest plist)
-  :obsolete set-lookup-handlers!
-  `(set-lookup-handlers! ,modes ,@plist))
-
 
 ;;
 ;; Library