Revert "Core/Event: prevent seasonal quests from resetting at server restart (#17455)"

This reverts commit 6a8ca9b0bf6f7cd355e1994723d6be6a5003d4d4.

# Conflicts:
#	src/server/game/Events/GameEventMgr.cpp

src/server/game/Events/GameEventMgr.cpp

@@ -142,9 +142,6 @@ bool GameEventMgr::StartEvent(uint16 event_id, bool overwrite)
             if (data.end <= data.start)
                 data.end = data.start + data.length;
         }
-
-        // When event is started, set its worldstate to current time
-        sWorld->setWorldState(event_id, GameTime::GetGameTime());
         return false;
     }
     else
@@ -180,9 +177,6 @@ void GameEventMgr::StopEvent(uint16 event_id, bool overwrite)
     RemoveActiveEvent(event_id);
     UnApplyEvent(event_id);
 
-    // When event is stopped, clean up its worldstate
-    sWorld->setWorldState(event_id, 0);
-
     if (overwrite && !serverwide_evt)
     {
         data.start = GameTime::GetGameTime() - data.length * MINUTE;
@@ -1098,8 +1092,6 @@ uint32 GameEventMgr::Update()                               // return the next e
         }
         else
         {
-            // If event is inactive, periodically clean up its worldstate
-            sWorld->setWorldState(itr, 0);
             //TC_LOG_DEBUG("misc", "GameEvent %u is not active", itr->first);
             if (IsActiveEvent(itr))
                 deactivate.insert(itr);
@@ -1182,10 +1174,8 @@ void GameEventMgr::ApplyNewEvent(uint16 event_id)
     UpdateEventNPCVendor(event_id, true);
     // update bg holiday
     UpdateBattlegroundSettings();
-    // If event's worldstate is 0, it means the event hasn't been started yet. In that case, reset seasonal quests.
-    // 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.
-    if (sWorld->getWorldState(event_id) == 0)
-        sWorld->ResetEventSeasonalQuests(event_id);
+    // check for seasonal quest reset.
+    sWorld->ResetEventSeasonalQuests(event_id);
 }
 
 void GameEventMgr::UpdateEventNPCFlags(uint16 event_id)