Remove sync feature from HA mediaplayers for now

music_assistant/server/providers/hass_players/__init__.py

@@ -339,6 +339,7 @@ async def cmd_sync(self, player_id: str, target_player: str) -> None:
  - player_id: player_id of the player to handle the command.
  - target_player: player_id of the syncgroup master or group player.
  """
+ # NOTE: not in use yet, as we do not support syncgroups in MA for HA players
  await self.hass_prov.hass.call_service(
  domain="media_player",
  service="join",
@@ -353,6 +354,7 @@ async def cmd_unsync(self, player_id: str) -> None:
 
  - player_id: player_id of the player to handle the command.
  """
+ # NOTE: not in use yet, as we do not support syncgroups in MA for HA players
  await self.hass_prov.hass.call_service(
  domain="media_player",
  service="unjoin",
@@ -373,8 +375,6 @@ async def _setup_player(
  state["attributes"]["supported_features"]
  )
  supported_features: list[PlayerFeature] = []
- if MediaPlayerEntityFeature.GROUPING in hass_supported_features:
- supported_features.append(PlayerFeature.SYNC)
  if MediaPlayerEntityFeature.PAUSE in hass_supported_features:
  supported_features.append(PlayerFeature.PAUSE)
  if MediaPlayerEntityFeature.VOLUME_SET in hass_supported_features: