Remove pylena module from Pylene repository
The Pylena module is now in a different repository (https://gitlab.lrde.epita.fr/olena/pylena). Furthermore, the Conan packaging was compiling this module, which was unnecessary and error-prone.
So, this merge request is intended to:
- Clean the
pylene-python
directory and only keep the strictly necessary elements - Fix the conan packaging after the MR !126 (merged)