[django/django] 497930: Use `callable` instead of `six.callable`.

[GitHub]

Branch: refs/heads/master
Home: https://github.com/django/django
Commit: 497930b7f69e2c298faa3f784c4523ea351e5e6f
https://github.com/django/django/commit/497930b7f69e2c298faa3f784c4523ea351e5e6f
Author: Baptiste Mispelon <bmis...@gmail.com>
Date: 2013-10-29 (Tue, 29 Oct 2013)

Changed paths:
M django/db/migrations/operations/special.py

Log Message:
-----------
Use `callable` instead of `six.callable`.

The `callable` builtin was added back in python 3.2
which is the minimal python3 version supported by django
at this point.