security/py-certbot: drop unused dependency

Drop dependency on repoze.sphinx.autointerface. This extension isn't
used since sphinx update and this upstream change:

https://github.com/certbot/certbot/commit/06c81138630c6155fb37009c075320fca30c361c

With hat:   python

security/py-certbot/Makefile

 PORTNAME=	certbot
 PORTVERSION=	${ACME_VERSION}
+PORTREVISION=	1
 PORTEPOCH=	1
 CATEGORIES=	security python
 MASTER_SITES=	PYPI \
@@ -42,7 +43,6 @@ OPTIONS_DEFAULT=MANPAGES
 MANPAGES_BUILD_DEPENDS=	${RUN_DEPENDS} \
 			${PYTHON_PKGNAMEPREFIX}sphinx>=1.2,1:textproc/py-sphinx@${PY_FLAVOR} \
 			${PYTHON_PKGNAMEPREFIX}sphinx_rtd_theme>=0:textproc/py-sphinx_rtd_theme@${PY_FLAVOR} \
-			${PYTHON_PKGNAMEPREFIX}repoze.sphinx.autointerface>=0:devel/py-repoze.sphinx.autointerface@${PY_FLAVOR}
 MANPAGES_PLIST_FILES=	share/man/man1/certbot.1.gz \
 			share/man/man7/certbot.7.gz