Simplify registration fields in database.

ticdesk_events/models.py

@@ -19,22 +19,15 @@ class Voucher(models.Model):
     used = models.BooleanField(default=False)
     used_person_uid = models.CharField(max_length=20, blank=True, null=True)
 
-class RegistrationFieldSet(models.Model):
+class RegistrationField(models.Model):
     class Meta:
         app_label = 'ticdesk_events'
 
     project_cn = models.CharField(max_length=50)
     person_uid = models.CharField(max_length=20)
-
-class RegistrationField(models.Model):
-    class Meta:
-        app_label = 'ticdesk_events'
-
     title = models.CharField(max_length=30)
     content = models.CharField(max_length=30)
 
-    registrationfieldset = models.ForiegnKey(RegistrationFieldSet)
-
 # FIXME make inheritance from TeckidsGroup work
 class TeckidsProject(ldapdb.models.Model, TeckidsLdapMixin):
     class Meta: