refactor(src/server/game/*): remove unused imports (big part 3) (#20315)

src/server/game/Entities/Creature/Creature.cpp

@@ -33,7 +33,6 @@
 #include "LootMgr.h"
 #include "ObjectMgr.h"
 #include "Opcodes.h"
-#include "OutdoorPvPMgr.h"
 #include "Pet.h"
 #include "Player.h"
 #include "PoolMgr.h"

src/server/game/Entities/Creature/Creature.h

@@ -23,7 +23,6 @@
 #include "Common.h"
 #include "CreatureData.h"
 #include "DatabaseEnv.h"
-#include "ItemTemplate.h"
 #include "LootMgr.h"
 #include "Unit.h"
 #include "World.h"