PEP8 cleanups, unused imports cleanups

mayan/apps/document_signatures/tests.py

@@ -2,13 +2,12 @@ from __future__ import absolute_import
 
 import os
 
-from django.utils import unittest
 from django.conf import settings
 from django.core.files.base import File
+from django.utils import unittest
 
-from django_gpg.api import SIGNATURE_STATE_VALID
-from documents.models import Document, DocumentType
 from documents.literals import VERSION_UPDATE_MAJOR, RELEASE_LEVEL_FINAL
+from documents.models import Document, DocumentType
 
 from .models import DocumentVersionSignature