PEP8 cleanups.

mayan/apps/document_signatures/managers.py

@@ -38,7 +38,7 @@ class EmbeddedSignatureManager(models.Manager):
 
         try:
             with document_version.open() as file_object:
-                signature_result = key.sign_file(
+                key.sign_file(
                     binary=True, file_object=file_object,
                     output=temporary_filename, passphrase=passphrase
                 )

mayan/apps/document_signatures/tests/test_models.py

@@ -332,9 +332,6 @@ class EmbeddedSignaturesTestCase(TestCase):
 
         self.assertEqual(EmbeddedSignature.objects.count(), 1)
 
-        with new_version.open() as file_object:
-            document_content_hash = hashlib.sha256(file_object.read()).hexdigest()
-
         with new_version.open() as file_object:
             file_object.seek(0, 2)
             new_size = file_object.tell()

mayan/apps/document_signatures/tests/test_views.py

@@ -5,7 +5,7 @@ from django.core.files import File
 from django_downloadview.test import assert_download_response
 
 from django_gpg.models import Key
-from documents.models import Document, DocumentVersion
+from documents.models import DocumentVersion
 from documents.tests.literals import TEST_DOCUMENT_PATH
 from documents.tests.test_views import GenericDocumentViewTestCase
 from user_management.tests import (
@@ -325,8 +325,6 @@ class SignaturesViewTestCase(GenericDocumentViewTestCase):
         for document in self.document_type.documents.all():
             document.delete(to_trash=False)
 
-        from documents.models import DocumentType
-
         old_hooks = DocumentVersion._post_save_hooks
         DocumentVersion._post_save_hooks = {}
         for count in range(TEST_UNSIGNED_DOCUMENT_COUNT):