Same as r34878, delete clearConversionCache from API

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@34879 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/interfaces/cached_convertable.py

@@ -90,13 +90,3 @@ class ICachedConvertable(Interface):
 
     **kw -- conversion parameters
     """
-
-  def clearConversionCache():
-    """
-    Clear the conversion cache for the current document.
-
-    NOTE: clearing conversion cache should be implemented
-    also with non-clearable caching systems, for example
-    by automatically adding the revision number to the 
-    conversion keys.
-    """