Delete custom WorkflowMethod

Now covertToBaseFormat check if transition is available.
Avoid calling useless workflow transition on TempObject


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35748 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/mixin/base_convertable.py

@@ -75,14 +75,6 @@ class BaseConvertableFileMixin:
     """
     raise NotImplementedError
 
-  def convertFile(self, **kw):
-    """
-    Workflow transition invoked when conversion occurs.
-    Usefull for document instances which are not associated
-    to processing_status_workflow like TempObject.
-    """
-  convertFile = WorkflowMethod(convertFile)
-
   security.declareProtected(Permissions.AccessContentsInformation,
                                                                  'getBaseData')
   def getBaseData(self, default=_MARKER):