security/py-yubikey-manager: remove unused dependency

And the deprecation that goes with it.
According to the the sources log, libu2f-host has not been needed since
version 0.6.1 back in 2018.

security/py-yubikey-manager/Makefile

@@ -12,9 +12,6 @@ WWW=		https://developers.yubico.com/yubikey-manager/
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/COPYING
 
-DEPRECATED=	Depends on expired security/libu2f-host
-EXPIRATION_DATE=2025-09-01
-
 BUILD_DEPENDS=	${RUN_DEPENDS} \
 		${PYTHON_PKGNAMEPREFIX}poetry-core>=1.0.0:devel/py-poetry-core@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}click>0:devel/py-click@${PY_FLAVOR} \
@@ -25,7 +22,6 @@ RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}click>0:devel/py-click@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pyusb>0:devel/py-pyusb@${PY_FLAVOR} \
 		RSA_SecurID_getpasswd:devel/libccid \
 		pcsc-spy:devel/pcsc-lite \
-		u2f-host:security/libu2f-host \
 		ykpersonalize:security/ykpers
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}makefun>0:devel/py-makefun@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pytest>0:devel/py-pytest@${PY_FLAVOR}