remove updateConversionCache() that does just make a needless access to cache...

remove updateConversionCache() that does just make a needless access to cache plugins (should be part of r28370).


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@28371 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/interfaces/document.py

@@ -235,10 +235,6 @@ class IDocument(Interface):
     needed here to overwrite class attribute with instance attrs
     """
 
-  def updateConversionCache():
-    """Initialise Caches
-    """
-
   def hasConversion(**kw):
     """Return a boolean if conversion is cached
     """