Drop django-address dependency and keep only street, zip code and city (/!\ Breaking commit, can't upgrade)

apps/registration/models.py

@@ -3,8 +3,8 @@
 
 from datetime import date
 
-from address.models import AddressField
 from django.contrib.sites.models import Site
+from django.core.validators import MaxValueValidator, MinValueValidator
 from django.db import models
 from django.template import loader
 from django.urls import reverse_lazy
@@ -139,10 +139,19 @@ class ParticipantRegistration(Registration):
         default="other",
     )
 
-    address = AddressField(
+    address = models.CharField(
+        max_length=255,
         verbose_name=_("address"),
-        null=True,
-        default=None,
+    )
+
+    zip_code = models.PositiveSmallIntegerField(
+        verbose_name=_("zip code"),
+        validators=[MinValueValidator(1000), MaxValueValidator(99999)],
+    )
+
+    city = models.CharField(
+        max_length=255,
+        verbose_name=_("city"),
     )
 
     phone_number = PhoneNumberField(