Revert "*: providers and sources -> channels, PolicyModel to PolicyBindingModel that uses custom M2M through"

This reverts commit 7ed3ceb960.

passbook/policies/dummy/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 3.0.5 on 2020-05-15 19:58
+# Generated by Django 3.0.5 on 2020-05-10 10:01
 
 import django.db.models.deletion
 from django.db import migrations, models
@@ -9,7 +9,8 @@ class Migration(migrations.Migration):
     initial = True
 
     dependencies = [
-        ("passbook_policies", "0001_initial"),
+        ("passbook_policies", "0003_auto_20200508_1642"),
+        ("passbook_core", "0013_delete_debugpolicy"),
     ]
 
     operations = [
@@ -24,7 +25,7 @@ class Migration(migrations.Migration):
                         parent_link=True,
                         primary_key=True,
                         serialize=False,
-                        to="passbook_policies.Policy",
+                        to="passbook_core.Policy",
                     ),
                 ),
                 ("result", models.BooleanField(default=False)),
@@ -35,6 +36,6 @@ class Migration(migrations.Migration):
                 "verbose_name": "Dummy Policy",
                 "verbose_name_plural": "Dummy Policies",
             },
-            bases=("passbook_policies.policy",),
+            bases=("passbook_core.policy",),
         ),
     ]

passbook/policies/dummy/models.py

@@ -6,7 +6,7 @@ from django.db import models
 from django.utils.translation import gettext_lazy as _
 from structlog import get_logger
 
-from passbook.policies.models import Policy
+from passbook.core.models import Policy
 from passbook.policies.types import PolicyRequest, PolicyResult
 
 LOGGER = get_logger()