Disable python. This ancient version of gdb wants python2.

Also, while I'm here drop maintainership. I've not used this port in 4 years.
Mark it as DEPRECATED and expire at the end of the year since I don't think it's
worth updating. If someone else wants to do it, be my guest. If there's a better
expiration date, then feel free to update it.

Also, appease portlint while I'm here...

devel/arm-none-eabi-gdb/Makefile

@@ -7,17 +7,22 @@ PORTREVISION=	4
 CATEGORIES=	devel
 MASTER_SITES=	GNU
 PKGNAMEPREFIX=	arm-none-eabi-
-DISTNAME=	gdb-${PORTVERSION}
 
-MAINTAINER=	imp@FreeBSD.org
+MAINTAINER=	ports@FreeBSD.org
 COMMENT=	GNU GDB for the arm bare metal target
+
+LICENSE=	GPLv3
+
+DEPRECATED=	This is an old, obsolete version of gdb
+EXPIRATION_DATA=2020-12-31
+
 LIB_DEPENDS=	libexpat.so:textproc/expat2
 
 USES=		gmake tar:xz iconv gmake libtool
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--target=arm-none-eabi --program-prefix=arm-none-eabi- --disable-nls \
-		--disable-werror
+		--disable-werror --with-python=no
 
 pre-configure:
 	cd ${WRKSRC} ; ${RM} -r dejagnu expect tcl texinfo