multimedia/ptx-kmod: Remove DEPRECATED

This device is still available and popular in the Japanese market to record
MPEG2-TS of the ISDB-T and ISDB-S services.  It does not make sense
to mark this deprecated only because the ISDB-S3 service is not supported:

 - S3 is a different standard and is not replacing the current ISDB-S.
   The adoption rate is only 15% as of 2023.

 - People are using this deive via PCI-to-PCIe bridge even on modern
   motherboards.

 - This driver has no build issue at this moment.

PR:	276184

multimedia/ptx-kmod/Makefile

@@ -12,9 +12,6 @@ WWW=		https://d.hatena.ne.jp/bsdaemon/20100429/1272556078
 
 LICENSE=	GPLv3
 
-DEPRECATED=	Legacy PCI-based hardware released around 2009 and 2010
-EXPIRATION_DATE=2024-02-29
-
 ONLY_FOR_ARCHS=	amd64 i386 powerpc64 powerpc64le
 
 USES=		kmod shebangfix