Remove python_2_unicode_compatible

Python 3.6 or go home!

{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/users/models.py

@@ -1,11 +1,9 @@
 from django.contrib.auth.models import AbstractUser
 from django.db import models
 from django.urls import reverse
-from django.utils.encoding import python_2_unicode_compatible
 from django.utils.translation import ugettext_lazy as _
 
 
-@python_2_unicode_compatible
 class User(AbstractUser):
 
     # First Name and Last Name do not cover name patterns