Remove initial tests users and their partners
CHANGELOG:
### Removed
- [#694](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/694) Remove initial tests users and their partners
Related card: https://trello.com/c/1372jdCn/1076-treure-usuaris-inicials-dani-i-c%C3%A9sar