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