Refs #23919 -- Removed python_2_unicode_compatible decorator usage

tests/many_to_many/models.py

@@ -7,10 +7,8 @@ In this example, an ``Article`` can be published in multiple ``Publication``
 objects, and a ``Publication`` has multiple ``Article`` objects.
 """
 from django.db import models
-from django.utils.encoding import python_2_unicode_compatible
 
 
-@python_2_unicode_compatible
 class Publication(models.Model):
     title = models.CharField(max_length=30)
 
@@ -21,7 +19,6 @@ class Publication(models.Model):
         ordering = ('title',)
 
 
-@python_2_unicode_compatible
 class Tag(models.Model):
     id = models.BigAutoField(primary_key=True)
     name = models.CharField(max_length=50)
@@ -30,7 +27,6 @@ class Tag(models.Model):
         return self.name
 
 
-@python_2_unicode_compatible
 class Article(models.Model):
     headline = models.CharField(max_length=100)
     # Assign a unicode string as name to make sure the intermediary model is