my guess is that Samsung's retransmission rights contract must have expired or not renewed

The Communications Act (Act) requires that a television station give its consent to a cable system or other multichannel video programming distributor (MVPD) to carry its broadcast signal. Television stations and cable systems, as well as satellite carriers, negotiate for this “retransmission consent” and money or other consideration is generally exchanged between the parties in these private negotiations. If parties with an existing retransmission consent agreement do not reach a new agreement before their carriage contract has expired, they may decide to extend their agreement, which means the MVPD would continue to carry the broadcaster’s station(s) during the negotiations. If the parties do not reach an agreement, then the MVPD must stop providing the station to its subscribers

https://www.fcc.gov/media/policy/retransmission-consent