diff --git a/product/ERP5/mixin/base_convertable.py b/product/ERP5/mixin/base_convertable.py
index 3e81f46c99f80101980c034d2b8f2ac52b06e08e..1a852577456d9d9dd86539270a96173ffc72e0ed 100644
--- a/product/ERP5/mixin/base_convertable.py
+++ b/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):