Reverted document.delete auto gridfs delete

tests/fields.py

@@ -1620,38 +1620,6 @@ class FieldTest(unittest.TestCase):
             file = FileField()
         DemoFile.objects.create()
 
-    def test_file_delete_cleanup(self):
-        """Ensure that the gridfs file is deleted when a document
-        with a GridFSProxied Field is deleted"""
-        class TestFile(Document):
-            file = FileField()
-
-        class TestImage(Document):
-            image = ImageField()
-
-        TestFile.drop_collection()
-
-        testfile = TestFile()
-        testfile.file.put('Hello, World!')
-        testfile.save()
-
-        testfile_grid_id = testfile.file.grid_id
-        testfile_fs = testfile.file.fs
-
-        testfile.delete()
-        self.assertFalse(testfile_fs.exists(testfile_grid_id))
-
-        TestImage.drop_collection()
-
-        testimage = TestImage()
-        testimage.image.put(open(TEST_IMAGE_PATH, 'r'))
-        testimage.save()
-
-        testimage_grid_id = testimage.image.grid_id
-        testimage_fs = testimage.image.fs
-
-        testimage.delete()
-        self.assertFalse(testimage_fs.exists(testimage_grid_id))
 
     def test_file_field_no_default(self):