gnu: Remove python2 versions of Django packages.

Python 2 is EOL and not supported by current versions of Django.

* gnu/packages/django.scm (python-django, python-django-tagging)[properties]:
Remove PYTHON2-VARIANT.
* gnu/packages/django.scm (python2-django, python2-django-simple-math-captcha,
python2-pytest-django, python2-django-filter, python2-django-allauth,
python2-django-gravatar2, python2-django-assets, python2-django-jsonfield,
python2-dj-database-url, python2-django-bulk-update,
python2-django-contact-form, python2-django-contrib-comments,
python2-django-overextends, python2-django-redis, python2-django-rq,
python2-django-sortedm2m, python2-django-appconf, python2-django-statici18n,
python2-django-tagging): Remove variables.

gnu/packages/django.scm

@@ -126,21 +126,7 @@ (define-public python-django
 any Web site.  Django focuses on automating as much as possible and adhering
 to the @dfn{don't repeat yourself} (DRY) principle.")
     (license license:bsd-3)
-    (properties `((python2-variant . ,(delay python2-django))
-                  (cpe-name . "django")))))
-
-(define-public python2-django
-  (let ((base (package-with-python2 (strip-python2-variant python-django))))
-    (package
-      (inherit base)
-      (native-inputs
-       `(;; Test requirements for Python 2 taken from
-         ;; tests/requirements/py3.txt: enum34 and mock.
-         ("python2-enum34" ,python2-enum34)
-         ("python2-mock" ,python2-mock)
-         ;; When adding memcached mind: for Python 2 memcached <= 1.53 is
-         ;; required.
-         ,@(package-native-inputs base))))))
+    (properties `((cpe-name . "django")))))
 
 (define-public python-django-2.2
   (package
@@ -238,9 +224,6 @@ (define-public python-django-simple-math-captcha
 with arguments to the field constructor.")
     (license license:asl2.0)))
 
-(define-public python2-django-simple-math-captcha
-  (package-with-python2 python-django-simple-math-captcha))
-
 (define-public python-django-classy-tags
   (package
     (name "python-django-classy-tags")
@@ -370,9 +353,6 @@ (define-public python-pytest-django
 useful tools for testing Django applications and projects.")
     (license license:bsd-3)))
 
-(define-public python2-pytest-django
-  (package-with-python2 python-pytest-django))
-
 (define-public python-django-haystack
   (package
     (name "python-django-haystack")
@@ -452,9 +432,6 @@ (define-public python-django-filter
 them do this.")
     (license license:bsd-3)))
 
-(define-public python2-django-filter
-  (package-with-python2 python-django-filter))
-
 (define-public python-django-allauth
   (package
     (name "python-django-allauth")
@@ -491,9 +468,6 @@ (define-public python-django-allauth
 account authentication.")
     (license license:expat)))
 
-(define-public python2-django-allauth
-  (package-with-python2 python-django-allauth))
-
 (define-public python-django-debug-toolbar
   (package
     (name "python-django-debug-toolbar")
@@ -553,9 +527,6 @@ (define-public python-django-gravatar2
 templatetags and a full test suite.")
     (license license:expat)))
 
-(define-public python2-django-gravatar2
-  (package-with-python2 python-django-gravatar2))
-
 (define-public python-django-assets
   (package
     (name "python-django-assets")
@@ -580,9 +551,6 @@ (define-public python-django-assets
 merging, minifying and compiling CSS and Javascript files.")
     (license license:bsd-2)))
 
-(define-public python2-django-assets
-  (package-with-python2 python-django-assets))
-
 (define-public python-django-jinja
   (package
     (name "python-django-jinja")
@@ -652,9 +620,6 @@ (define-public python-django-jsonfield
 use, simply add the field to one of your models.")
     (license license:expat)))
 
-(define-public python2-django-jsonfield
-  (package-with-python2 python-django-jsonfield))
-
 (define-public python-dj-database-url
   (package
     (name "python-dj-database-url")
@@ -677,9 +642,6 @@ (define-public python-dj-database-url
 conn_max_age argument to easily enable Django’s connection pool.")
     (license license:bsd-2)))
 
-(define-public python2-dj-database-url
-  (package-with-python2 python-dj-database-url))
-
 (define-public python-django-picklefield
   (package
     (name "python-django-picklefield")
@@ -731,9 +693,6 @@ (define-public python-django-bulk-update
 project aims to bulk update given objects using one query over Django ORM.")
     (license license:expat)))
 
-(define-public python2-django-bulk-update
-  (package-with-python2 python-django-bulk-update))
-
 (define-public python-django-contact-form
   (package
     (name "python-django-contact-form")
@@ -766,9 +725,6 @@ (define-public python-django-contact-form
 for Django sites.")
     (license license:bsd-3)))
 
-(define-public python2-django-contact-form
-  (package-with-python2 python-django-contact-form))
-
 (define-public python-django-contrib-comments
   (package
     (name "python-django-contrib-comments")
@@ -791,9 +747,6 @@ (define-public python-django-contrib-comments
 entries, photos, book chapters, or anything else.")
     (license license:bsd-3)))
 
-(define-public python2-django-contrib-comments
-  (package-with-python2 python-django-contrib-comments))
-
 (define-public python-django-overextends
   (package
     (name "python-django-overextends")
@@ -824,9 +777,6 @@ (define-public python-django-overextends
 project.")
     (license license:bsd-2)))
 
-(define-public python2-django-overextends
-  (package-with-python2 python-django-overextends))
-
 (define-public python-django-pipeline
   (package
     (name "python-django-pipeline")
@@ -905,9 +855,6 @@ (define-public python-django-redis
       "Full featured redis cache backend for Django.")
     (license license:bsd-3)))
 
-(define-public python2-django-redis
-  (package-with-python2 python-django-redis))
-
 (define-public python-django-rq
   (package
     (name "python-django-rq")
@@ -944,9 +891,6 @@ (define-public python-django-rq
 settings.py and easily use them in your project.")
     (license license:expat)))
 
-(define-public python2-django-rq
-  (package-with-python2 python-django-rq))
-
 (define-public python-django-q
   (package
     (name "python-django-q")
@@ -1002,9 +946,6 @@ (define-public python-django-sortedm2m
 the order of added relations.")
     (license license:bsd-3)))
 
-(define-public python2-django-sortedm2m
-  (package-with-python2 python-django-sortedm2m))
-
 (define-public python-django-appconf
   (package
     (name "python-django-appconf")
@@ -1036,9 +977,6 @@ (define-public python-django-appconf
 name is purely coincidental.")
     (license license:bsd-3)))
 
-(define-public python2-django-appconf
-  (package-with-python2 python-django-appconf))
-
 (define-public python-django-statici18n
   (package
     (name "python-django-statici18n")
@@ -1075,9 +1013,6 @@ (define-public python-django-statici18n
 static files.")
     (license license:bsd-3)))
 
-(define-public python2-django-statici18n
-  (package-with-python2 python-django-statici18n))
-
 (define-public python-django-tagging
   (package
     (name "python-django-tagging")
@@ -1104,23 +1039,8 @@ (define-public python-django-tagging
     (description "This package provides a generic tagging application for
 Django projects, which allows association of a number of tags with any
 @code{Model} instance and makes retrieval of tags simple.")
-    (properties `((python2-variant . ,(delay python2-django-tagging))))
     (license license:bsd-3)))
 
-(define-public python2-django-tagging
-  (let ((base (package-with-python2
-                (strip-python2-variant python-django-tagging))))
-    (package
-      (inherit base)
-      (version "0.4.6")
-      (source
-        (origin
-          (method url-fetch)
-          (uri (pypi-uri "django-tagging" version))
-          (sha256
-           (base32
-            "0s7b4v45j783yaxs7rni10k24san0ya77nqz4s7zdf3jhfpk42r1")))))))
-
 (define-public python-djangorestframework
   (package
     (name "python-djangorestframework")