refactor(Scripts/Northrend): remove unused imports (#19460)

* refactor(Scripts/Northrend): remove unused imports

* chore: wip

src/server/scripts/Northrend/Ulduar/Ulduar/boss_flame_leviathan.cpp

@@ -16,11 +16,11 @@
  */
 
 #include "AchievementCriteriaScript.h"
+#include "CellImpl.h"
 #include "CombatAI.h"
 #include "CreatureScript.h"
 #include "GameObjectScript.h"
 #include "GridNotifiers.h"
-#include "Opcodes.h"
 #include "PassiveAI.h"
 #include "Player.h"
 #include "ScriptedCreature.h"
@@ -33,6 +33,12 @@
 #include "Vehicle.h"
 #include "ulduar.h"
 
+/// @todo: this import is not necessary for compilation and marked as unused by the IDE
+//  however, for some reasons removing it would cause a damn linking issue
+//  there is probably some underlying problem with imports which should properly addressed
+//  see: https://github.com/azerothcore/azerothcore-wotlk/issues/9766
+#include "GridNotifiersImpl.h"
+
 enum LeviathanSpells
 {
     // Leviathan basic

src/server/scripts/Northrend/Ulduar/Ulduar/boss_yoggsaron.cpp

@@ -19,7 +19,6 @@
 #include "CreatureAI.h"
 #include "CreatureScript.h"
 #include "Object.h"
-#include "Opcodes.h"
 #include "PassiveAI.h"
 #include "Player.h"
 #include "ScriptedCreature.h"

src/server/scripts/Northrend/Ulduar/Ulduar/ulduar.cpp

@@ -19,7 +19,6 @@
 #include "AreaTriggerScript.h"
 #include "CombatAI.h"
 #include "CreatureScript.h"
-#include "GameObjectScript.h"
 #include "PassiveAI.h"
 #include "Player.h"
 #include "ScriptedCreature.h"

src/server/scripts/Northrend/Ulduar/Ulduar/ulduar.h

@@ -18,11 +18,8 @@
 #ifndef DEF_ULDUAR_H
 #define DEF_ULDUAR_H
 
-#include "CellImpl.h"
-#include "Chat.h"
 #include "CreatureAIImpl.h"
 #include "GridNotifiers.h"
-#include "GridNotifiersImpl.h"
 
 #define DataHeader "UU"