Use get_model() from django.apps instead of get_model() from compat.

openinghours/utils.py

@@ -1,13 +1,11 @@
 import datetime
-from django.conf import settings
 try:
     from threadlocals.threadlocals import get_current_request
 except ImportError:
     get_current_request = None
 from openinghours.models import OpeningHours, ClosingRules, PREMISES_MODEL
 from django.core.exceptions import ImproperlyConfigured
-
-from compat import get_model
+from django.apps import apps
 
 
 def get_premises_model():
@@ -20,7 +18,7 @@ def get_premises_model():
     except ValueError:
         raise ImproperlyConfigured("OPENINGHOURS_PREMISES_MODEL must be of the"
                                    " form 'app_label.model_name'")
-    premises_model = get_model(app_label=app_label, model_name=model_name)
+    premises_model = apps.get_model(app_label=app_label, model_name=model_name)
     if premises_model is None:
         raise ImproperlyConfigured("OPENINGHOURS_PREMISES_MODEL refers to"
                                    " model '%s' that has not been installed"