To delete an intervention, simply open it and click on the 🗑 symbol at the top right, right next to the 🖊️ Edit button.

If you don't see the Delete button, you can activate it in the mobile settings.

If you do not have access to the settings from the mobile phone, the modification will have to be made in the mobile application settings from the web application by an "Administrator" role:

Settings -> Mobile application -> View intervention -> Show Delete button.