refactor(Core): remove unused imports (#9767)

src/server/scripts/Kalimdor/CavernsOfTime/EscapeFromDurnholdeKeep/instance_old_hillsbrad.cpp

@@ -18,7 +18,6 @@
 #include "InstanceScript.h"
 #include "Player.h"
 #include "ScriptMgr.h"
-#include "ScriptedCreature.h"
 #include "old_hillsbrad.h"
 
 const Position instancePositions[INSTANCE_POSITIONS_COUNT] =

src/server/scripts/Kalimdor/zone_silithus.cpp

@@ -28,7 +28,6 @@ quest_a_pawn_on_the_eternal_pawn
 EndContentData */
 
 #include "AccountMgr.h"
-#include "BanMgr.h"
 #include "GameObject.h"
 #include "GameObjectAI.h"
 #include "Group.h"
@@ -38,7 +37,6 @@ EndContentData */
 #include "ScriptedGossip.h"
 #include "Spell.h"
 #include "SpellInfo.h"
-#include "WorldSession.h"
 
 /*####
 # quest_a_pawn_on_the_eternal_board (Defines)