update accounting model

billard/migrations/0004_accounting.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Generated by Django 1.10.5 on 2017-02-04 05:48
+# Generated by Django 1.10.5 on 2017-02-04 10:17
 from __future__ import unicode_literals
 
 from django.db import migrations, models
@@ -22,7 +22,6 @@ class Migration(migrations.Migration):
                 ('time_to', models.DateTimeField(blank=True, null=True)),
                 ('prize', models.DecimalField(blank=True, decimal_places=2, max_digits=5, null=True)),
                 ('client', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='billard.Client')),
-                ('location', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='billard.Location')),
             ],
             options={
                 'ordering': ['-time_from'],