chore!: remove Django admin interface (was debug only)

This isn't used and provides a potential security hole, and probably
will not play nice with the Bento authorization scheme.

chord_metadata_service/metadata/urls.py

@@ -1,32 +1,12 @@
-"""metadata URL Configuration
-
-The `urlpatterns` list routes URLs to views. For more information please see:
-    https://docs.djangoproject.com/en/2.2/topics/http/urls/
-Examples:
-Function views
-    1. Add an import:  from my_app import views
-    2. Add a URL to urlpatterns:  path('', views.home, name='home')
-Class-based views
-    1. Add an import:  from other_app.views import Home
-    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
-Including another URLconf
-    1. Import the include() function: from django.urls import include, path
-    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
-"""
-from django.contrib import admin
 from django.urls import path, include
 from chord_metadata_service.restapi import api_views, urls as restapi_urls
 from chord_metadata_service.chord import urls as chord_urls
 from drf_spectacular.views import SpectacularAPIView, SpectacularSwaggerView
 
-# TODO: django.conf.settings breaks reverse(), how to import properly?
-from .settings import DEBUG
-
 urlpatterns = [
     path('api/', include(restapi_urls)),
     path('service-info', api_views.service_info, name="service-info"),
     *chord_urls.urlpatterns,  # TODO: Use include? can we double up?
-    *([path('admin/', admin.site.urls)] if DEBUG else []),
     # OpenAPI 3 documentation with Swagger UI
     path('schema/', SpectacularAPIView.as_view(), name="schema"),
     path('', SpectacularSwaggerView.as_view(), name="swagger-ui"),