Disable artifact spam on roundend (#21970)

* Disable artifact spam on roundend

I think part of the issue was the enormous amount of logspam but at any rate this turns it off.

* Also this

* And these

Content.Shared/CCVar/CCVars.cs

@@ -327,12 +327,6 @@ namespace Content.Shared.CCVar
         public static readonly CVarDef<int> GameAlertLevelChangeDelay =
             CVarDef.Create("game.alert_level_change_delay", 30, CVar.SERVERONLY);
 
-        /// <summary>
-        /// How many times per second artifacts when the round is over.
-        /// If set to 0, they won't activate (on a timer) when the round ends.
-        /// </summary>
-        public static readonly CVarDef<float> ArtifactRoundEndTimer = CVarDef.Create("game.artifact_round_end_timer", 0.5f, CVar.NOTIFY | CVar.REPLICATED);
-
         /// <summary>
         /// The time in seconds that the server should wait before restarting the round.
         /// Defaults to 2 minutes.