Fix OpenLobby mode by removing premature _emptyRaid reset

The counter was being reset when posting the FFA embed, before anyone joined. This broke OpenLobby mode - if the FFA raid was empty, users had to cycle through the entire empty limit again. Counter should only reset when trainers actually join (already handled in ReadTrainers).

Author: hexbyt3

SysBot.Pokemon/SV/BotRaid/RotatingRaidBotSV.cs

@@ -3005,9 +3005,6 @@ private async Task EnqueueEmbed(List<string>? names, string message, bool hatTri
             if (description.Length > 4096)
                 description = description[..4096];
 
-            if (_emptyRaid == _settings.LobbyOptions.EmptyRaidLimit && _settings.LobbyOptions.LobbyMethod == LobbyMethodOptions.OpenLobby)
-                _emptyRaid = 0;
-
             if (disband) // Wait for trainer to load before disband
                 await Task.Delay(5_000, token).ConfigureAwait(false);