devel/py-astroid: Update to 2.6.0

Changes:	https://github.com/PyCQA/astroid/releases
		https://github.com/PyCQA/astroid/blob/master/ChangeLog

devel/py-astroid/Makefile

 PORTNAME=	astroid
-PORTVERSION=	2.5.8
+PORTVERSION=	2.6.0
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
@@ -10,7 +10,6 @@ COMMENT=	Abstract syntax tree for Python with inference support
 LICENSE=	LGPL21+
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools_scm>=0:devel/py-setuptools_scm@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}lazy-object-proxy>=1.4.0:devel/py-lazy-object-proxy@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}wrapt>=1.11<1.13:devel/py-wrapt@${PY_FLAVOR}
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytest>=0:devel/py-pytest@${PY_FLAVOR}

devel/py-astroid/distinfo

-TIMESTAMP = 1622214054
-SHA256 (astroid-2.5.8.tar.gz) = 2476b7f0d6cec13f4c1f53b54bea2ce072310ac9fc7acb669d5270190c748042
-SIZE (astroid-2.5.8.tar.gz) = 185727
+TIMESTAMP = 1624189685
+SHA256 (astroid-2.6.0.tar.gz) = 09bdb456e02564731f8b5957cdd0c98a7f01d2db5e90eb1d794c353c28bfd705
+SIZE (astroid-2.6.0.tar.gz) = 187339