Fix arcade goodbye message implementation (#26514)

Content.Server/Arcade/BlockGame/BlockGameArcadeComponent.cs

@@ -19,9 +19,4 @@ public sealed partial class BlockGameArcadeComponent : Component
     /// The players currently viewing (but not playing) the active session of NT-BG.
     /// </summary>
     public readonly List<ICommonSession> Spectators = new();
-
-    /// <summary>
-    /// Whether the game machine should thank (or otherwise talk to) the player when they leave
-    /// </summary>
-    public bool ShouldSayThankYou;
 }