clearCache should not take any argument.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@1127 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Cache.py

@@ -139,5 +139,5 @@ class CachingMethod:
 
 allow_class(CachingMethod)
 
-def clearCache(self):
+def clearCache():
   cached_object_dict.clear()