Drop old partialmethod emulation

Author: adamchainz

django_fsm/__init__.py

@@ -2,7 +2,7 @@
 State tracking functionality for django models
 """
 import inspect
-from functools import wraps
+from functools import partialmethod, wraps
 
 import django
 from django.db import models
@@ -11,12 +11,6 @@
 from django.db.models.signals import class_prepared
 from django_fsm.signals import pre_transition, post_transition
 
-try:
-    from functools import partialmethod
-except ImportError:
-    # python 2.7, so we are on django<=1.11
-    from django.utils.functional import curry as partialmethod
-
 try:
     from django.apps import apps as django_apps