--- a/src/pyams_content/shared/common/interfaces/zmi.py	Fri Nov 10 12:05:58 2017 +0100
+++ b/src/pyams_content/shared/common/interfaces/zmi.py	Fri Nov 10 12:06:33 2017 +0100
@@ -34,7 +34,3 @@
 
 class ISiteRootDashboardTable(IDashboardTable):
     """Site root dashboard table marker interface"""
-
-
-class IPreviewForm(Interface):
-    """Preview form marker interface"""