$OpenBSD: patch-docs_source_conf_py,v 1.3 2015/12/01 22:45:49 edd Exp $

A problem with inheritance diagrams. Causes build to crash. Even if it
did work, the generated diagrams have non-deterministic names, making
putting their name in a PLIST somewhat difficult.

Disable intersphinx.

--- docs/source/conf.py.orig	Wed Aug 12 02:04:53 2015
+++ docs/source/conf.py	Sun Nov 29 19:39:44 2015
@@ -56,8 +56,6 @@ extensions = [
     'sphinx.ext.autodoc',
     'sphinx.ext.autosummary',
     'sphinx.ext.doctest',
-    'sphinx.ext.inheritance_diagram',
-    'sphinx.ext.intersphinx',
     'IPython.sphinxext.ipython_console_highlighting',
     'IPython.sphinxext.ipython_directive',
     'numpydoc',  # to preprocess docstrings
