Update django-phonenumber-field requirement from ==7.3.* to ==8.3.* (#5522)

* Update django-phonenumber-field requirement from ==7.3.* to ==8.3.*

Updates the requirements on [django-phonenumber-field](https://github.com/stefanfoulis/django-phonenumber-field) to permit the latest version.
- [Release notes](https://github.com/stefanfoulis/django-phonenumber-field/releases)
- [Changelog](https://github.com/stefanfoulis/django-phonenumber-field/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/stefanfoulis/django-phonenumber-field/compare/7.3.0...8.3.0)

---
updated-dependencies:
- dependency-name: django-phonenumber-field
  dependency-version: 8.3.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

* Remove invalid geo codes

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Raphael Michel <michel@rami.io>

src/pretix/helpers/countries.py

@@ -25,7 +25,9 @@ from django.utils import translation
 from django.utils.translation import gettext_noop
 from django_countries import Countries, collator
 from django_countries.fields import CountryField
-from phonenumbers.data import _COUNTRY_CODE_TO_REGION_CODE
+from phonenumbers import (
+    COUNTRY_CODE_TO_REGION_CODE, REGION_CODE_FOR_NON_GEO_ENTITY,
+)
 
 from pretix.base.i18n import get_babel_locale, get_language_without_region
 
@@ -109,9 +111,11 @@ def get_phone_prefixes_sorted_and_localized():
     val = []
 
     locale = Locale(translation.to_locale(language))
-    for prefix, values in _COUNTRY_CODE_TO_REGION_CODE.items():
+    for prefix, values in COUNTRY_CODE_TO_REGION_CODE.items():
         prefix = "+%d" % prefix
         for country_code in values:
+            if country_code == REGION_CODE_FOR_NON_GEO_ENTITY:
+                continue
             country_name = locale.territories.get(country_code)
             if country_name:
                 val.append((prefix, "{} {}".format(country_name, prefix)))