Delete CRMLeadLine "activation_notes"
CHANGELOG:
### Removed
- [#995](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/995) Delete CRMLeadLine "activation_notes"
Related card: https://trello.com/c/N8rgWkJX/1546-eliminar-tota-l%C3%B2gica-relacionada-amb-el-camp-consideracions-de-ba