Fix loneops (#15874)

Content.Server/GameTicking/Rules/GameRuleSystem.cs

@@ -4,7 +4,7 @@ namespace Content.Server.GameTicking.Rules;
 
 public abstract class GameRuleSystem<T> : EntitySystem where T : Component
 {
-    [Dependency] protected GameTicker GameTicker = default!;
+    [Dependency] protected readonly GameTicker GameTicker = default!;
 
     public override void Initialize()
     {

Content.Server/StationEvents/Events/LoneOpsSpawnRule.cs

@@ -20,7 +20,10 @@ public sealed class LoneOpsSpawnRule : StationEventSystem<LoneOpsSpawnRuleCompon
         base.Started(uid, component, gameRule, args);
 
         if (!_nukeopsRuleSystem.CheckLoneOpsSpawn())
+        {
+            ForceEndSelf(uid, gameRule);
             return;
+        }
 
         var shuttleMap = _mapManager.CreateMap();
         var options = new MapLoadOptions

Resources/Prototypes/GameRules/events.yml

@@ -279,4 +279,3 @@
     reoccurrenceDelay: 25
     duration: 1
   - type: LoneOpsSpawnRule
-  - type: NukeopsRule