Revert "Core/Event: prevent seasonal quests from resetting at server restart

Port From (https://github.com/TrinityCore/TrinityCore/commit/306022054bec6010a63e80407c8d2f8d672b935b)

Source/Game/Events/GameEventManager.cs

@@ -137,8 +137,6 @@ namespace Game
                         data.end = data.start + data.length;
                 }
 
-                // When event is started, set its worldstate to current time
-                Global.WorldMgr.SetWorldState(event_id, GameTime.GetGameTime());
                 return false;
             }
             else
@@ -174,9 +172,6 @@ namespace Game
             RemoveActiveEvent(event_id);
             UnApplyEvent(event_id);
 
-            // When event is stopped, clean up its worldstate
-            Global.WorldMgr.SetWorldState(event_id, 0);
-
             if (overwrite && !serverwide_evt)
             {
                 data.start = GameTime.GetGameTime() - data.length * Time.Minute;
@@ -1017,8 +1012,6 @@ namespace Game
                 }
                 else
                 {
-                    // If event is inactive, periodically clean up its worldstate
-                    Global.WorldMgr.SetWorldState(id, 0);
                     Log.outDebug(LogFilter.Misc, "GameEvent {0} is not active", id);
                     if (IsActiveEvent(id))
                         deactivate.Add(id);
@@ -1106,10 +1099,8 @@ namespace Game
             //! Run SAI scripts with SMART_EVENT_GAME_EVENT_START
             RunSmartAIScripts(event_id, true);
 
-            // If event's worldstate is 0, it means the event hasn't been started yet. In that case, reset seasonal quests.
+            // check for seasonal quest reset.
-            // When event ends (if it expires or if it's stopped via commands) worldstate will be set to 0 again, ready for another seasonal quest reset.
+            Global.WorldMgr.ResetEventSeasonalQuests(event_id);
-            if (Global.WorldMgr.GetWorldState(event_id) == 0)
-                Global.WorldMgr.ResetEventSeasonalQuests(event_id);
         }
 
         void UpdateEventNPCFlags(ushort event_id)