OOoDocument inherit now from BaseConvertableMixin, TextConvertableMixin and BaseConvertableAndFileMixin.
 * remove all methods defined in these mixin



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35249 20353a03-c40f-0410-a6d1-a30d3c3de9de