PEP8 and general cleanups

apps/linking/forms.py

@@ -1,12 +1,10 @@
 from __future__ import absolute_import
 
 from django import forms
-from django.utils.translation import ugettext_lazy as _
 from django.utils.translation import ugettext
 from django.core.urlresolvers import reverse
 from django.utils.safestring import mark_safe
 from django.template.defaultfilters import capfirst
-from django.conf import settings
 
 from documents.widgets import document_html_widget
 from tags.widgets import get_tags_inline_widget