`bound_form.cleaned_data` already returns the file data if there was any.

`bound_form.files` returns a `MultiValueDict` which errors when passing
`.CONTENT` into a model constructor.

djangorestframework/resources.py

@@ -247,8 +247,6 @@ class FormResource(Resource):
             # Validation succeeded...
             cleaned_data = bound_form.cleaned_data
 
-            cleaned_data.update(bound_form.files)
-
             # Add in any extra fields to the cleaned content...
             for key in (allowed_extra_fields_set & seen_fields_set) - set(cleaned_data.keys()):
                 cleaned_data[key] = data[key]