Jouni Seppänen 93a5cbd118 Remove import of py23 fron subset/__init__.py
This import is causing an unsightly DeprecationWarning.

I checked manually: the only names being used from py23 are
open, range and zip, which are defined to be the same as the
corresponding Python 3 builtins, so this should cause no
visible change except for suppressing the warning.
2020-08-02 08:04:19 +03:00
..