Disabling a site-wide action on Django

If you need to disable a site-wide action you can call AdminSite.disable_action().
admin.site.disable_action(‘delete_selected’) (See: Django reference guide)

… or

def get_actions(self, request):
  actions = super(ApplicationAdmin, self).get_actions(request)
  if 'delete_selected' in actions:
    del actions['delete_selected']
  return actions

, for a specific ModelAdmin.