devel/py-itanium_demangler: Chase the addition of BSD0CLAUSE

It is no longer necessary to define the permissions associated with this
license since its now officially recognized by the ports framework.

Reported by:	pkg-fallout

devel/py-itanium_demangler/Makefile

@@ -8,9 +8,7 @@ MAINTAINER=	0mp@FreeBSD.org
 COMMENT=	Pure Python parser for mangled itanium symbols
 
 LICENSE=	BSD0CLAUSE
-LICENSE_NAME=	0-clause BSD
 LICENSE_FILE=	${WRKSRC}/README.md
-LICENSE_PERMS=	dist-mirror dist-sell pkg-mirror pkg-sell auto-accept
 
 USES=		python:3.6+
 USE_PYTHON=	autoplist distutils