--- a/src/pyams_content/shared/view/zmi/reference.py	Wed Apr 11 16:44:46 2018 +0200
+++ b/src/pyams_content/shared/view/zmi/reference.py	Wed Apr 11 16:46:31 2018 +0200
@@ -28,7 +28,6 @@
 
 # import packages
 from pyams_form.form import AJAXEditForm
-from pyams_form.schema import ResetButton
 from pyams_pagelet.pagelet import pagelet_config
 from pyams_skin.viewlet.menu import MenuItem, MenuDivider
 from pyams_viewlet.viewlet import viewlet_config