Removed two unused model fields

src/pretix/base/migrations/0028_auto_20160816_1242.py

@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.7 on 2016-08-16 12:42
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0027_auto_20160815_1254'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='cartposition',
+            name='base_price',
+        ),
+        migrations.RemoveField(
+            model_name='cartposition',
+            name='voucher_discount',
+        ),
+        migrations.RemoveField(
+            model_name='orderposition',
+            name='base_price',
+        ),
+        migrations.RemoveField(
+            model_name='orderposition',
+            name='voucher_discount',
+        ),
+    ]

src/pretix/base/models/orders.py

@@ -353,10 +353,6 @@ class AbstractPosition(models.Model):
     :type attendee_name: str
     :param voucher: A voucher that has been applied to this sale
     :type voucher: Voucher
-    :param voucher_discount: The absolute discount granted by the applied voucher
-    :type voucher_discount: decimal.Decimal
-    :param base_price: The base price without any discounts applied
-    :type base_price: decimal.Decimal
     """
     item = models.ForeignKey(
         Item,
@@ -382,12 +378,6 @@ class AbstractPosition(models.Model):
     voucher = models.ForeignKey(
         'Voucher', null=True, blank=True
     )
-    voucher_discount = models.DecimalField(
-        default=Decimal('0.00'), decimal_places=2, max_digits=10
-    )
-    base_price = models.DecimalField(
-        decimal_places=2, max_digits=10, null=True, blank=True
-    )
 
     class Meta:
         abstract = True
@@ -412,13 +402,6 @@ class AbstractPosition(models.Model):
             else:
                 q.answer = ""
 
-    def save(self, *args, **kwargs):
-        if self.voucher is None and self.base_price is None:
-            self.base_price = self.price
-        if self.voucher_discount != Decimal('0.00') and self.base_price is not None:
-            self.price = self.base_price - self.voucher_discount
-        return super().save(*args, **kwargs)
-
 
 class OrderPosition(AbstractPosition):
     """