remove @python_2_unicode_compatible from models without __str__

Author: sk1p

tagging/tests/models.py

@@ -4,7 +4,6 @@
 from tagging.fields import TagField
 
 
-@python_2_unicode_compatible
 class Perch(models.Model):
     size = models.IntegerField()
     smelly = models.BooleanField(default=True)
@@ -44,11 +43,9 @@ class Meta:
         ordering = ['name']
 
 
-@python_2_unicode_compatible
 class FormTest(models.Model):
     tags = TagField('Test', help_text='Test')
 
 
-@python_2_unicode_compatible
 class FormTestNull(models.Model):
     tags = TagField(null=True)