cleanup: Remove expired ports:

2021-09-15 www/py-django-rest-swagger: Has expired: Upstream no longer maintained, please use www/py-drf-yasg instead
2021-09-15 www/py-django-taggit-serializer: Obsolete, please use www/py-django-taggit instead
2021-09-16 www/efront: Unsupported by upstream

MOVED

@@ -16476,3 +16476,6 @@ databases/mongodb49|databases/mongodb50|2021-09-01|Has expired: This was a devel
 editors/vim-console|editors/vim|2021-09-02|The "vim" package is now console-only
 editors/vim-tiny|editors/vim@tiny|2021-09-02|The vim-tiny package is now a vim flavor
 lang/gcc7|lang/gcc10|2021-09-05|Has expired: Unsupported by upstream. Use GCC 10 or newer instead.
+www/py-django-rest-swagger|www/py-drf-yasg|2021-09-17|Has expired: Has expired: Upstream no longer maintained, please use www/py-drf-yasg instead
+www/py-django-taggit-serializer|www/py-django-taggit|2021-09-17|Has expired: Obsolete, please use www/py-django-taggit instead
+www/efront||2021-09-17|Has expired: Unsupported by upstream

www/Makefile

@@ -121,7 +121,6 @@
     SUBDIR += e2guardian
     SUBDIR += edbrowse
     SUBDIR += eden
-    SUBDIR += efront
     SUBDIR += element-web
     SUBDIR += elgg
     SUBDIR += elinks
@@ -1550,7 +1549,6 @@
     SUBDIR += py-django-redis
     SUBDIR += py-django-registration
     SUBDIR += py-django-registration-redux
-    SUBDIR += py-django-rest-swagger
     SUBDIR += py-django-reversion
     SUBDIR += py-django-reversion-compare
     SUBDIR += py-django-sekizai
@@ -1567,7 +1565,6 @@
     SUBDIR += py-django-tables2
     SUBDIR += py-django-tagging
     SUBDIR += py-django-taggit
-    SUBDIR += py-django-taggit-serializer
     SUBDIR += py-django-tastypie
     SUBDIR += py-django-templatetag-sugar
     SUBDIR += py-django-timezone-field