Remove typecasting of file objects into Django's File class, not needed in Django >1.8.x.

mayan/apps/ocr/tests/test_api.py

@@ -3,7 +3,6 @@ from __future__ import unicode_literals
 import json
 
 from django.contrib.auth import get_user_model
-from django.core.files import File
 from django.core.urlresolvers import reverse
 
 from rest_framework import status
@@ -37,7 +36,7 @@ class OCRAPITestCase(APITestCase):
 
         with open(TEST_SMALL_DOCUMENT_PATH) as file_object:
             self.document = self.document_type.new_document(
-                file_object=File(file_object),
+                file_object=file_object,
             )
 
     def tearDown(self):