Remove useless import of SupplyLineMixin.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@3411 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Resource.py

@@ -36,7 +36,6 @@ from Products.ERP5Type.XMLMatrix import XMLMatrix
 
 from Products.ERP5.Variated import Variated
 from Products.ERP5.Core.Resource import Resource as CoreResource
-from Products.ERP5.Document.SupplyLine import SupplyLineMixin
 from Products.CMFCore.WorkflowCore import WorkflowMethod
 from Products.CMFCategory.Renderer import Renderer
 from Products.CMFCore.utils import getToolByName