completely remove usages of django-adminplus

it was futzing up some /admin/ login stuff, and I hadn't actually used
the three views using it in years, so probably better to just yeet it
(technical term) into the sun.

Signed-off-by: Brian S. Stephan <bss@incorporeal.org>

dr_botzo/settings.py

@@ -38,7 +38,6 @@ INSTALLED_APPS = [
     'django.contrib.staticfiles',
     'django.contrib.sites',
     'django_extensions',
-    'adminplus',
     'bootstrap3',
     'rest_framework',
     'countdown',

dr_botzo/urls.py

@@ -1,14 +1,9 @@
 """General/baselite/site-wide URLs."""
-from adminplus.sites import AdminSitePlus
 from django.conf.urls import include
 from django.contrib import admin
 from django.urls import path
 from django.views.generic import TemplateView
 
-admin.site = AdminSitePlus()
-admin.sites.site = admin.site
-admin.autodiscover()
-
 urlpatterns = [
     path('', TemplateView.as_view(template_name='index.html'), name='index'),