An administrator for the entire organisation can/has to activate the ability to delete applications.
This is done under Admin -> Company Settings.
You can find names and contact information for the Admin by clicking on Support ♡ in the top right corner.
When this function is activated, users with superuser or Admin permission can delete the candidate.
This is done by:
1. Go to the vacancy -> applications -> select candidate
2. Click on "More actions"
3. Select: "Delete application".