Remove unused method

coin/billing/models.py

@@ -418,10 +418,6 @@ class Payment(models.Model):
         invoice.save()
         self.save()
 
-    @property
-    def name(self):
-        return str(self)
-
     def __unicode__(self):
         if self.member is not None:
             return 'Paiment de %0.2f€ le %s par %s' \