convert/bzr: expect unicode metadata, encode in UTF-8 (issue3232) Before this patch, metadata and file names were interpreted like: - unicode objects were converted to UTF-8 - non unicode objects were left unchanged Looking at the code and bzr being known for transcoding filenames, we expect everything to be returned as unicode objects, and we want to encode them in UTF-8, like the subversion source does. To do that, we just remove the custom implementation of .recode().