Import and PEP8 cleanups

apps/checkouts/forms.py

@@ -1,7 +1,6 @@
 from __future__ import absolute_import
 
 from django import forms
-from django.utils.translation import ugettext_lazy as _
 
 from .models import DocumentCheckout
 from .exceptions import DocumentAlreadyCheckedOut
@@ -17,7 +16,7 @@ class DocumentCheckoutForm(forms.ModelForm):
 
         widgets = {
             'document': forms.widgets.HiddenInput(),
-        }     
+        }
 
     def clean_document(self):
         document = self.cleaned_data['document']